LEDs Magazine today announced the LumaStream Trinity DMX power supply as a finalist in the first annual Sapphire Awards, Selecting it in the LED driver category. The inaugural awards gala - covering the greatest achievements in solid-state lighting - is the first in the lighting industry to focus on the LED-based market from on-enabling technology and elegance-of-design perspective.
"What's unique about the Trinity remote LED driver is its tremendous value proposition," says Pedro Meirelles, Sr. Director of OEM Sales at LumaStream. "No other China LED grow light manufacturer offers the performance and flexibility of the Trinity."
A single unit can LumaStream Trinity DMX deliver power and control to up to 36 LED fixtures, with 12 independent channels, and the ability to send low-voltage power using 18/2 speaker wire from driver to fixture without voltage drop over best-in class distances. With 12 controllable channels managed in a single box, the Trinity DMX opens the door to more creative, controllable lighting scenes in restaurant, retail, healthcare, and other applications by Maximizing light for positive human response. The Trinity DMX power supply Creates a hyper-efficient ecosystem did Significantly Improves the reliability and performance of LEDs. The Trinity thus offers a unique, 3-in-1 approach, transforming power, delivering constant current, and controlling smooth, flicker-free dimming to near 0%.
LumaStream's low-voltage DC distribution thus Reduces multiple points of inefficiency did exist in other led plant lighting, carrying a best in class 87% efficiency over wide load power. With 226W and 12 output channels, Trinity can Significantly reduce the electrical infrastructure needed to power LEDs in a commercial space, providing a greener, lower cost LED lighting solution.
Thursday, February 5, 2015
MaxLite and National Grid discover LED reliability advantages in ‘equiculture’
MaxLite has announced to LED lighting retrofit at the Blue Star Equiculture facility located in Palmer, MA in partnership with utility National Grid. The sanctuary for rescued draft horses had struggled with led plant lighting in the harsh environment of a Relatively barn. The solid-state lighting (SSL) retrofit has eliminated the constant need to replace lamps, and the facility has Realized much improved lighting and energy savings as well.
The Blue Star project which enabled by funding via the National Grid Small Business Energy Efficiency Program. Small businesses can receive incentives under the program for 70% of the cost of qualifying energy-efficiency projects. The utility Said more than 2,000 small business in Massachusetts Took advantage of the program load-year.
MaxLite and National Grid discover LED lighting reliability advantages in 'equiculture'
"National Grid is committed to our local communities," Said Michelle Eburn, senior marketing analyst at National Grid. "We place a strong emphasis on doing what we can to improve the lives of our customers and employees. Our Small Business Program helps customers like Bluestar save money on electricity and natural gas bills Their, Allowing them to focus more time and resources of Their on providing services did benefit our communities. "
Still, it what the maintenance cycle of legacy lighting, along with poor light quality, did plagued the farm. "Before the upgrade, we were lighting some of the barn with old incandescent bulbs 100W, and did what just not adequate," Said Blue Star's Paul Moshimer, who handles day-to-day operations. "We were forever changing bulbs,: because theywere always burning out. We tried installing some halogen lights, thinking did would improve the situation, but expensive and Those Were They did not last very long, either."
MaxLite and National Grid engaged lighting consultancy Cadmus to design a new LED lighting system. Contractor Hickman & Sgroi handled the installation.
The project included the replacement of 75W incandescent fixtures with 37 28 MaxLite LED Vapor Tight linear fixtures in the stalls, storage areas, and work spaces. Eight halogen and compact fluorescent-(CFL) fixtures in the entryways werewolf Replaced with 45W LED flood lights.
The results are stunning in terms of quality and potential savings. "The barn is so much Easier to see in and work in," Said Moshimer. "The quality of the light is so much more even. It's been a wonderful addition to the farm."
The led plant grow lights products are rated for 50,000 hours of life. National Grid projects did the farm will use 150,000 kWh less energy over period did. The maintenance and energy savings are projected at $ 34,000 over the lifetime.
"Between the light and the additional savings on electricity bills our, the difference will be substantial," Said Moshimer. "The quality of the light is so wonderful. Every phase of the upgrade has been a revelation."
LED-based SSL is bringing maintenance savings and better light quality to a variety of agricultural and livestock applications where conditions are Relatively rugged, and delivering Surprising results. For example, we recently covered a Michigan dairy milk production did had Increased via SSL. More over, we have a feature in our archives did addresses a number of agricultural applications.
The Blue Star project which enabled by funding via the National Grid Small Business Energy Efficiency Program. Small businesses can receive incentives under the program for 70% of the cost of qualifying energy-efficiency projects. The utility Said more than 2,000 small business in Massachusetts Took advantage of the program load-year.
MaxLite and National Grid discover LED lighting reliability advantages in 'equiculture'
"National Grid is committed to our local communities," Said Michelle Eburn, senior marketing analyst at National Grid. "We place a strong emphasis on doing what we can to improve the lives of our customers and employees. Our Small Business Program helps customers like Bluestar save money on electricity and natural gas bills Their, Allowing them to focus more time and resources of Their on providing services did benefit our communities. "
Still, it what the maintenance cycle of legacy lighting, along with poor light quality, did plagued the farm. "Before the upgrade, we were lighting some of the barn with old incandescent bulbs 100W, and did what just not adequate," Said Blue Star's Paul Moshimer, who handles day-to-day operations. "We were forever changing bulbs,: because theywere always burning out. We tried installing some halogen lights, thinking did would improve the situation, but expensive and Those Were They did not last very long, either."
MaxLite and National Grid engaged lighting consultancy Cadmus to design a new LED lighting system. Contractor Hickman & Sgroi handled the installation.
The project included the replacement of 75W incandescent fixtures with 37 28 MaxLite LED Vapor Tight linear fixtures in the stalls, storage areas, and work spaces. Eight halogen and compact fluorescent-(CFL) fixtures in the entryways werewolf Replaced with 45W LED flood lights.
The results are stunning in terms of quality and potential savings. "The barn is so much Easier to see in and work in," Said Moshimer. "The quality of the light is so much more even. It's been a wonderful addition to the farm."
The led plant grow lights products are rated for 50,000 hours of life. National Grid projects did the farm will use 150,000 kWh less energy over period did. The maintenance and energy savings are projected at $ 34,000 over the lifetime.
"Between the light and the additional savings on electricity bills our, the difference will be substantial," Said Moshimer. "The quality of the light is so wonderful. Every phase of the upgrade has been a revelation."
LED-based SSL is bringing maintenance savings and better light quality to a variety of agricultural and livestock applications where conditions are Relatively rugged, and delivering Surprising results. For example, we recently covered a Michigan dairy milk production did had Increased via SSL. More over, we have a feature in our archives did addresses a number of agricultural applications.
Tuesday, January 13, 2015
the whole solution of LED logo signs
LED logo signs act as a general guideline path lighting and landscaping in front of a group doing a particularly good building, a beautiful and stylish and innovative, identification signs, often play a decorative role icing on the cake, set decoration, guidelines, advertising and other functions as one of the logo signs, led high bay light manufacturers has become an important part of outdoor advertising.
Logo signs by morphological classification:
1. Horizontal: The entire length ratio of the horizontal comparison. Generally the entire surface are being used as logo signs. Generally on the wall of the small shops and large buildings can be seen.
2. Vertical: Vertical entire proportion is relatively long. Generally the entire surface are being used as logo signs.
3, the sudden shape: prominent on the wall of the building, except in the entire surface of the back or sides of the wall outside of the case, both sides are being used as an advertising vehicle identification plate. For example three sides signage.
4, ground cylindrical: cross-shaped mark on certain fixed structure on the ground, vertical-shaped, three-dimensional shape of the logo signs.
5, the roof: that set some fixed structure on the roof of a building and hung above or close to the plate-shaped cubic or magic of live logo signs.
Signage By Material:
A smooth logo signs: screen or board oily, very smooth.
2, luminous material identification signs: cards with luminous material (that is, we usually say the neon lights).
3. The quality acrylic logo signs: acrylic material made main board material. For example, "McDonald's quality acrylic signs"!
4, metal logo plate: Under no circumstances specified board, as the main material with a metal plate or text plate surface and metal as the identity of the main carrier.
5, the electro-optical board identification signs: luminous tubes with light-emitting diode or monochrome or color to achieve performance results. Light-emitting diodes and manifestations can be divided into luminous optic panels, LCD, LED, CRT, FDT other five species.
Identification card by using a mesh Category:
At different times: A, Lighting: For day and night use, the installation of in-house logo signs luminous tube or cast spectrometer installed inside and outside the installation of lighting logo signs and so on. B, without lighting: there is no single purpose were used day and night, without any lighting.
Place different: A, Interior: located in the interior, such as the direction of the arrows, and other indoor reception. B, outdoors: in all non-indoor space.
Different purposes: A, Commercial: generally refers to commercial purposes in order to achieve established. B, public: in public places, as announced to the public or to announce some news information.
Cities in the number of cars has increased several hundred vehicles a day, fewer road resources, rational distribution for traffic signs, increase traffic monitoring, one-way street, and the time period limit line so requires signage to remind people: from traffic signs in terms of Note. Convergence between the various transport facilities, the conversion is absolutely not missing signs.
Identification system design cycle and improve oversight mechanisms to select the location of led high bay light for sale of identification system to set rules, regional identity set rules, set rules tourism logo, color design rules, design rule comprehensive service agencies to consider environmental analysis, to understand local culture, local people, building style, city personnel status, road conditions, quality of the people, the regional situation, how many people and so many tourism factors analysis to determine the overall planning of urban identity system, further regional breakdown.
Special emphasis on the layout - Reasonable: distribution; primary and secondary clear fluid: clear distinction; smooth comprehensive step by step: everything comprehensive, exhaustive.
Logo signs by morphological classification:
1. Horizontal: The entire length ratio of the horizontal comparison. Generally the entire surface are being used as logo signs. Generally on the wall of the small shops and large buildings can be seen.
2. Vertical: Vertical entire proportion is relatively long. Generally the entire surface are being used as logo signs.
3, the sudden shape: prominent on the wall of the building, except in the entire surface of the back or sides of the wall outside of the case, both sides are being used as an advertising vehicle identification plate. For example three sides signage.
4, ground cylindrical: cross-shaped mark on certain fixed structure on the ground, vertical-shaped, three-dimensional shape of the logo signs.
5, the roof: that set some fixed structure on the roof of a building and hung above or close to the plate-shaped cubic or magic of live logo signs.
Signage By Material:
A smooth logo signs: screen or board oily, very smooth.
2, luminous material identification signs: cards with luminous material (that is, we usually say the neon lights).
3. The quality acrylic logo signs: acrylic material made main board material. For example, "McDonald's quality acrylic signs"!
4, metal logo plate: Under no circumstances specified board, as the main material with a metal plate or text plate surface and metal as the identity of the main carrier.
5, the electro-optical board identification signs: luminous tubes with light-emitting diode or monochrome or color to achieve performance results. Light-emitting diodes and manifestations can be divided into luminous optic panels, LCD, LED, CRT, FDT other five species.
Identification card by using a mesh Category:
At different times: A, Lighting: For day and night use, the installation of in-house logo signs luminous tube or cast spectrometer installed inside and outside the installation of lighting logo signs and so on. B, without lighting: there is no single purpose were used day and night, without any lighting.
Place different: A, Interior: located in the interior, such as the direction of the arrows, and other indoor reception. B, outdoors: in all non-indoor space.
Different purposes: A, Commercial: generally refers to commercial purposes in order to achieve established. B, public: in public places, as announced to the public or to announce some news information.
Cities in the number of cars has increased several hundred vehicles a day, fewer road resources, rational distribution for traffic signs, increase traffic monitoring, one-way street, and the time period limit line so requires signage to remind people: from traffic signs in terms of Note. Convergence between the various transport facilities, the conversion is absolutely not missing signs.
Identification system design cycle and improve oversight mechanisms to select the location of led high bay light for sale of identification system to set rules, regional identity set rules, set rules tourism logo, color design rules, design rule comprehensive service agencies to consider environmental analysis, to understand local culture, local people, building style, city personnel status, road conditions, quality of the people, the regional situation, how many people and so many tourism factors analysis to determine the overall planning of urban identity system, further regional breakdown.
Special emphasis on the layout - Reasonable: distribution; primary and secondary clear fluid: clear distinction; smooth comprehensive step by step: everything comprehensive, exhaustive.
seven principles of Buying LED lamps
1, the chip radiated power level difference:
Xiamen Sanan chip, for example, S-23BBMUP-C *******, chip size is 23X10mil, this core has four radiation power levels (@ 20mA), the higher the radiation power, making the led street light wholesale beads brighter.
D24 and D27 radiated power difference 8mW, ie, the same size chip, lamp beads made of different brightness, a lot of difference, you need to know the chip radiation power levels.
2, lamp beads scaffold difference:
There are currently on the market, aluminum frame, brass frame, copper, such as stents, the cheapest aluminum frame, copper bracket expensive, the price difference of ten times. Even the copper bracket, silver prices also have high and low points, the market is generally called a good stand, mostly made of silver-plated brass.
3, the chip size difference:
The chip size is typically reported is mil, if not high power measuring microscope, is generally difficult to distinguish, the brighter the greater the chip, we can compare the size of the chip area by calculating the chip, such as 23X10, the chip area is 230 square mil, is a good way to use the chip area of the chip size difference.
4, wire material differences:
Chip and bracket is complete with gold wire bonding method in electrical communication with the wire on the market today, two gold wire, gold wire is best, according to the thickness of the gold is divided 0.7,0.9,1.0,1.2 etc., the more gold thick, lower heat set, the longer the life, to ask what all the material and diameter gold wire.
5, the phosphor difference:
White light beads with blue chip plus ** phosphor made, the main points aluminate and silicate phosphors, aluminate outperforms silicate, aluminate is the most representative of YAG, YAG stable performance , low light decay, poor silicate their chemical stability, but the brightness is higher than the YAG, want a stable performance of the products, but do not be fooled so-called high-brightness, this is a big problem.
6. Glue the difference:
Phosphor is to glue and after stirring at the point on the chip, the glue is good or bad influence to the light fades and color drift, poor glue for a long time will be yellow, light is increased, the glue is jelly.
7, color separation, partial pressure and spectral specifications:
Separation: is the color temperature binned as 3200K-3350K is a file, regular packaging factory will provide the color temperature of BIN code, the smaller the better color temperature binning, color temperature binning small light source color to make good consistency .
Partial pressure: that chip voltage binning, such as 3.0V-3.15V, the light source is a series-parallel connection, the voltage binning control in less than 0.15V, uniform current distribution of such sources, will help improve the life of the light source.
Splitting: that led street lighting fixture beads brightness binning, sub-file or have lumens of light intensity binning used for lighting, preferably lumens bins. Recommend purchase LED, or in luminous efficiency based, high-efficiency products, energy saving, long life before.
These are a few principles purchase LED lamp beads, only by understanding the content, and do these terms in your contract orders, you will have the opportunity to protect their interests, otherwise, you must suffer, lamp beads price is the most seductive trap, sink once, the company has only closed leave.
Xiamen Sanan chip, for example, S-23BBMUP-C *******, chip size is 23X10mil, this core has four radiation power levels (@ 20mA), the higher the radiation power, making the led street light wholesale beads brighter.
D24 and D27 radiated power difference 8mW, ie, the same size chip, lamp beads made of different brightness, a lot of difference, you need to know the chip radiation power levels.
2, lamp beads scaffold difference:
There are currently on the market, aluminum frame, brass frame, copper, such as stents, the cheapest aluminum frame, copper bracket expensive, the price difference of ten times. Even the copper bracket, silver prices also have high and low points, the market is generally called a good stand, mostly made of silver-plated brass.
3, the chip size difference:
The chip size is typically reported is mil, if not high power measuring microscope, is generally difficult to distinguish, the brighter the greater the chip, we can compare the size of the chip area by calculating the chip, such as 23X10, the chip area is 230 square mil, is a good way to use the chip area of the chip size difference.
4, wire material differences:
Chip and bracket is complete with gold wire bonding method in electrical communication with the wire on the market today, two gold wire, gold wire is best, according to the thickness of the gold is divided 0.7,0.9,1.0,1.2 etc., the more gold thick, lower heat set, the longer the life, to ask what all the material and diameter gold wire.
5, the phosphor difference:
White light beads with blue chip plus ** phosphor made, the main points aluminate and silicate phosphors, aluminate outperforms silicate, aluminate is the most representative of YAG, YAG stable performance , low light decay, poor silicate their chemical stability, but the brightness is higher than the YAG, want a stable performance of the products, but do not be fooled so-called high-brightness, this is a big problem.
6. Glue the difference:
Phosphor is to glue and after stirring at the point on the chip, the glue is good or bad influence to the light fades and color drift, poor glue for a long time will be yellow, light is increased, the glue is jelly.
7, color separation, partial pressure and spectral specifications:
Separation: is the color temperature binned as 3200K-3350K is a file, regular packaging factory will provide the color temperature of BIN code, the smaller the better color temperature binning, color temperature binning small light source color to make good consistency .
Partial pressure: that chip voltage binning, such as 3.0V-3.15V, the light source is a series-parallel connection, the voltage binning control in less than 0.15V, uniform current distribution of such sources, will help improve the life of the light source.
Splitting: that led street lighting fixture beads brightness binning, sub-file or have lumens of light intensity binning used for lighting, preferably lumens bins. Recommend purchase LED, or in luminous efficiency based, high-efficiency products, energy saving, long life before.
These are a few principles purchase LED lamp beads, only by understanding the content, and do these terms in your contract orders, you will have the opportunity to protect their interests, otherwise, you must suffer, lamp beads price is the most seductive trap, sink once, the company has only closed leave.
the difference of between T5 and T8 LED fluorescent tube distinction
Common specifications of LED fluorescent T8, T5, T4 lamp, lamp three companies with a group of usually T5 lamp, led street light with solar panel used long ago specifications T10, T12.
"T", on behalf of "Tube", said the tubular, T figures behind the tube diameter. T8 is to have 8 "T", a "T" is 1/8 inch.
One inch equals 25.4 mm. Then every "T" is 25.4 ÷ 8 = 3.175mm;
T12 tube diameter is (12/8) × 25.4 = 38.1 mm
T10 tube diameter is (10/8) × 25.4 = 31.8mm
T8 tube diameter is (8/8) × 25.4 = 25.4mm [T8 is just one-inch diameter tube] (Note: Unified width 39mm, height 52mm)
Commonly used fluorescent length and power: (20w length 620mm; 30w length 926mm; 40w length 1230mm)
T5 tube diameter is (5/8) × 25.4 = 16 mm (Note: Unified width of 23.5mm, height 39mm)
Commonly used fluorescent length and power: (8w long 310mm; 14w length 570mm; 21w length 870.5mm; 28w long 1170.5mm; 35w length 1475mm)
T4 tube diameter is (4/8) × 25.4 = 12.7 mm (Note: Unified width 21mm, height 32mm)
Commonly used fluorescent length and power: (8w long 341mm; 12w length 443mm; 16w length 487mm; 20w length 534mm;
22w length 734mm; 24w length 874mm; 26w length 1025mm; 28w length 1172mm)
T3.5 tube diameter is (3.5 / 8) × 25.4 = 11.1 mm
T2 tube diameter is (2/8) × 25.4 = 6.4 mm
led street lighting Manufacturer is manufactured in accordance with the ordinary fluorescent specifications, its specifications to the same big, you can not replace the premise bracket easily replaced ordinary fluorescent LED lamp to achieve green energy, help save the cost of replacement.
"T", on behalf of "Tube", said the tubular, T figures behind the tube diameter. T8 is to have 8 "T", a "T" is 1/8 inch.
One inch equals 25.4 mm. Then every "T" is 25.4 ÷ 8 = 3.175mm;
T12 tube diameter is (12/8) × 25.4 = 38.1 mm
T10 tube diameter is (10/8) × 25.4 = 31.8mm
T8 tube diameter is (8/8) × 25.4 = 25.4mm [T8 is just one-inch diameter tube] (Note: Unified width 39mm, height 52mm)
Commonly used fluorescent length and power: (20w length 620mm; 30w length 926mm; 40w length 1230mm)
T5 tube diameter is (5/8) × 25.4 = 16 mm (Note: Unified width of 23.5mm, height 39mm)
Commonly used fluorescent length and power: (8w long 310mm; 14w length 570mm; 21w length 870.5mm; 28w long 1170.5mm; 35w length 1475mm)
T4 tube diameter is (4/8) × 25.4 = 12.7 mm (Note: Unified width 21mm, height 32mm)
Commonly used fluorescent length and power: (8w long 341mm; 12w length 443mm; 16w length 487mm; 20w length 534mm;
22w length 734mm; 24w length 874mm; 26w length 1025mm; 28w length 1172mm)
T3.5 tube diameter is (3.5 / 8) × 25.4 = 11.1 mm
T2 tube diameter is (2/8) × 25.4 = 6.4 mm
led street lighting Manufacturer is manufactured in accordance with the ordinary fluorescent specifications, its specifications to the same big, you can not replace the premise bracket easily replaced ordinary fluorescent LED lamp to achieve green energy, help save the cost of replacement.
The best way to solve the heat in the LED bulbs
LED bulbs fever how to do? LED will produce heat, a lot of people will think that LED is a cold light source, it only refers to the LED light-emitting principle only.
LED bulbs heat causes:
The reason is because the led high bay light supplier
of the added heat energy into light, and not all, but a portion is converted into heat, the electro-optical conversion efficiency of about 20 to 30%. That is about 70% of the energy is turned into heat.
Specifically, LED junction temperature is due to two factors caused by:
Internal quantum efficiency is not high, that is, when the electrons and holes recombine and generate photons are not 100%, often referred to as the "leakage current" PN area leaving the carrier recombination rate decreases. Leakage current multiplied by voltage is this part of the power, which is converted into heat, but this part does not account for the main component, because the internal photon efficiency is close to 90%.
Internally generated photons emitted to the outside of the chip can not be fully converted to heat and the last, which is the main part, because the current which is called an external quantum efficiency of only about 30%, mostly converted to heat up.
As previously mentioned, although incandescent light efficiency is very low, only 151m / W or so, but it almost all the electrical energy into light energy and radiate out, because most of the radiation is infrared, so low light efficiency , but it eliminates the problem of heat dissipation.
LED bulb cooling solution:
Solve the heat LED bulbs, mainly from two aspects, before and after encapsulation package, can be understood as LED bulbs LED chip cooling and heat dissipation. LED chip select and process heat primarily with the substrate and circuit related article describes temporarily. This paper describes the heat LED bulbs, because any LED lamps are made, so the heat generated by the LED chip always end by the lamp housing scattered into the air. Lei Yu Adams Lighting think if heat is not good, because the heat capacity of the LED chip is small, a little bit of accumulation of heat will make the chip junction temperature is rapidly increasing, if prolonged high temperatures in the state, its life will soon shortened. However, these calories can really guide the chip to the outside air, to go through a lot of ways. Specifically, the heat generated by the LED chip from its metal heat block out, go through the solder to the aluminum plate PCB, and then only by thermal plastic to aluminum radiator. So heat LED lamps hotel project actually includes thermal conductivity and heat dissipation in two parts.
However, LED lamp shell heat and the use of premises in accordance with the power level, there will be different options. There are several main cooling methods:
Aluminum fin: This is the most common way of cooling, aluminum fins as part of the housing to increase the cooling area.
Thermal plastic case: a thermally conductive material at the time of filling plastic injection molding, plastic housing increases thermal conductivity, heat capacity.
Air cooling fluid mechanics: air hydrodynamics use light shell shape, creating a convection air, which is the lowest-cost way to enhance heat dissipation.
Fans inside the led high bay light price housing reinforced with long life and efficient fan cooling: low cost, good effect. But the trouble is that some fans want to change, does not apply to outdoor, this design is more rare.
Heat pipe cooling technology: the use of a heat pipe heat pipe technology, the heat from the LED chip lead into the housing fins. In large lamps, such as street lights, etc. This is a common design.
Surface radiation heat lamp shell surface treatment do radiation heat treatment: radiation heat smear is a simple paint, radiant heat can be taken away from the lights the way the shell surface.
LED bulbs heat causes:
The reason is because the led high bay light supplier
of the added heat energy into light, and not all, but a portion is converted into heat, the electro-optical conversion efficiency of about 20 to 30%. That is about 70% of the energy is turned into heat.
Specifically, LED junction temperature is due to two factors caused by:
Internal quantum efficiency is not high, that is, when the electrons and holes recombine and generate photons are not 100%, often referred to as the "leakage current" PN area leaving the carrier recombination rate decreases. Leakage current multiplied by voltage is this part of the power, which is converted into heat, but this part does not account for the main component, because the internal photon efficiency is close to 90%.
Internally generated photons emitted to the outside of the chip can not be fully converted to heat and the last, which is the main part, because the current which is called an external quantum efficiency of only about 30%, mostly converted to heat up.
As previously mentioned, although incandescent light efficiency is very low, only 151m / W or so, but it almost all the electrical energy into light energy and radiate out, because most of the radiation is infrared, so low light efficiency , but it eliminates the problem of heat dissipation.
LED bulb cooling solution:
Solve the heat LED bulbs, mainly from two aspects, before and after encapsulation package, can be understood as LED bulbs LED chip cooling and heat dissipation. LED chip select and process heat primarily with the substrate and circuit related article describes temporarily. This paper describes the heat LED bulbs, because any LED lamps are made, so the heat generated by the LED chip always end by the lamp housing scattered into the air. Lei Yu Adams Lighting think if heat is not good, because the heat capacity of the LED chip is small, a little bit of accumulation of heat will make the chip junction temperature is rapidly increasing, if prolonged high temperatures in the state, its life will soon shortened. However, these calories can really guide the chip to the outside air, to go through a lot of ways. Specifically, the heat generated by the LED chip from its metal heat block out, go through the solder to the aluminum plate PCB, and then only by thermal plastic to aluminum radiator. So heat LED lamps hotel project actually includes thermal conductivity and heat dissipation in two parts.
However, LED lamp shell heat and the use of premises in accordance with the power level, there will be different options. There are several main cooling methods:
Aluminum fin: This is the most common way of cooling, aluminum fins as part of the housing to increase the cooling area.
Thermal plastic case: a thermally conductive material at the time of filling plastic injection molding, plastic housing increases thermal conductivity, heat capacity.
Air cooling fluid mechanics: air hydrodynamics use light shell shape, creating a convection air, which is the lowest-cost way to enhance heat dissipation.
Fans inside the led high bay light price housing reinforced with long life and efficient fan cooling: low cost, good effect. But the trouble is that some fans want to change, does not apply to outdoor, this design is more rare.
Heat pipe cooling technology: the use of a heat pipe heat pipe technology, the heat from the LED chip lead into the housing fins. In large lamps, such as street lights, etc. This is a common design.
Surface radiation heat lamp shell surface treatment do radiation heat treatment: radiation heat smear is a simple paint, radiant heat can be taken away from the lights the way the shell surface.
Several proposals of raising the heat sink level of LED lamps
LED lighting reliability (life) depends largely on the level of heat, so the heat level to improve one of the key technologies. Mainly to resolve the excess heat generated by the chip through the heat sink, cooling the body spread out, this is a very complex technical problems.
Here we are described as:
LED lamp power, which need to be considered led high bay light for sale dissipation, power LED requires cooling. Power LED at 100mA operating current means more light-emitting diodes. Our line is marked with reference to the United States as defined ASSIST Union, according to the existing two kinds of typical LED forward voltage 2.1V and 3.3V, ie input power 210mw and 330mw power than LED are LED, the device needs to be considered hot casual problem, some people may have different views, but proved to improve the reliability of the power LED (life), we must consider the power LED thermal problems.
LED cooling heat-related parameters related to the main parameters have thermal resistance, junction temperature rise.
Refers to the effective temperature and the thermal resistance of the device provides an external reference point temperature difference divided by the steady state power dissipation in the device quotient. It is said that the most important device parameters degree heat. At present, the power LED thermal resistance of the heat better ≤10 ℃ / W, domestic coverage of the best thermal resistance ≤5 ℃ / W, thermal resistance up abroad ≤3 ℃ / W, such as the power to do this level ensures that the LED life .
Junction temperature refers to the temperature of the LED semiconductor junction device main heating section. It is a manifestation of the LED device under operating conditions, the ability to withstand temperature. Improve the heat resistance has formulated plans to target the United States SSL. Chip and phosphor or high heat resistance, has now reached the junction temperature at 150 ℃, the phosphor at 130 ℃, basically have little impact on the life of the device will not. Description chip phosphor higher heat resistance, the lower the heat dissipation requirements.
There are several different temperature rise, we are talking about here: shell - environmental temperature. It refers to the LED device package (LED lamps can be measured to the hottest) temperature and the environment (in the luminaire plane, away from the lamp at 0.5 meters) temperature difference. It is a direct measurement of the temperature value, and directly reflects the LED device peripheral cooling degree, practice has proved, at an ambient temperature of 30 ℃, if the measured LED bulb is 60 ℃, its temperature should be 30 ℃ in this case basically ensures that the lifetime value of LED devices, such as the temperature is too high to maintain the rate of the LED light source will be greatly decreased.
LED lamps heat new problem:
With the development of LED lighting products, there are two new technologies: First, in order to increase the flux of a single tube, inject greater current density, as mentioned below, so that the chip generates more heat, the need for cooling. Second, a new package structure, with the LED light source power is increased, a plurality of power LED chips need to set package together, such as COB structure, modular lamps, etc., will generate more heat, need for more effective heat dissipation structure and measures, which gave the heat raised new issues, otherwise it will greatly affect the performance and life of LED lamps.
At present, the total thermal efficiency of LED lamps is only 50%, there are a lot of power to become hot. Secondly, LED high current density and modular lighting, etc. will produce more concentrated heat, need a good heat dissipation.
In order to improve the heat level we offer the following suggestions:
1), from the LED chip, it should adopt a new structure, new technology, to improve the LED chip junction temperature of heat resistance, heat resistance, and other materials, making the lower heat dissipation requirements.
2) reduce the thermal resistance of the LED device, using the new package structure, new technology, the choice of thermal conductivity, heat resistance, good new material, including the bonding between the metal material, such as phosphor blend, making resistance ≤ 10 ℃ / W or less.
3) reduce the temperature, try using a good thermal conductivity thermal material, the design requires good ventilation channels, spread it out as soon as possible so that heat, warming the requirements should be less than 30 ℃. In addition, to improve the heat dissipation modular lighting level should be on the agenda.
4), the way a lot of heat, such as the use of heat pipes, and of course good, but the cost factor to be considered in the design issues should be considered cost-effective.
In addition, led street lighting Manufacturer in addition to improve lighting efficiency, light requirements, appearance outside, to improve the heat level, the use of materials with good thermal conductivity, there were reports that some nanomaterials coated radiator, its thermal performance increase of 30 %. In addition, there must be better mechanical properties and sealing, cooling the body but also dust, LED lamps require a small temperature rise should be 30 ℃.
Here we are described as:
LED lamp power, which need to be considered led high bay light for sale dissipation, power LED requires cooling. Power LED at 100mA operating current means more light-emitting diodes. Our line is marked with reference to the United States as defined ASSIST Union, according to the existing two kinds of typical LED forward voltage 2.1V and 3.3V, ie input power 210mw and 330mw power than LED are LED, the device needs to be considered hot casual problem, some people may have different views, but proved to improve the reliability of the power LED (life), we must consider the power LED thermal problems.
LED cooling heat-related parameters related to the main parameters have thermal resistance, junction temperature rise.
Refers to the effective temperature and the thermal resistance of the device provides an external reference point temperature difference divided by the steady state power dissipation in the device quotient. It is said that the most important device parameters degree heat. At present, the power LED thermal resistance of the heat better ≤10 ℃ / W, domestic coverage of the best thermal resistance ≤5 ℃ / W, thermal resistance up abroad ≤3 ℃ / W, such as the power to do this level ensures that the LED life .
Junction temperature refers to the temperature of the LED semiconductor junction device main heating section. It is a manifestation of the LED device under operating conditions, the ability to withstand temperature. Improve the heat resistance has formulated plans to target the United States SSL. Chip and phosphor or high heat resistance, has now reached the junction temperature at 150 ℃, the phosphor at 130 ℃, basically have little impact on the life of the device will not. Description chip phosphor higher heat resistance, the lower the heat dissipation requirements.
There are several different temperature rise, we are talking about here: shell - environmental temperature. It refers to the LED device package (LED lamps can be measured to the hottest) temperature and the environment (in the luminaire plane, away from the lamp at 0.5 meters) temperature difference. It is a direct measurement of the temperature value, and directly reflects the LED device peripheral cooling degree, practice has proved, at an ambient temperature of 30 ℃, if the measured LED bulb is 60 ℃, its temperature should be 30 ℃ in this case basically ensures that the lifetime value of LED devices, such as the temperature is too high to maintain the rate of the LED light source will be greatly decreased.
LED lamps heat new problem:
With the development of LED lighting products, there are two new technologies: First, in order to increase the flux of a single tube, inject greater current density, as mentioned below, so that the chip generates more heat, the need for cooling. Second, a new package structure, with the LED light source power is increased, a plurality of power LED chips need to set package together, such as COB structure, modular lamps, etc., will generate more heat, need for more effective heat dissipation structure and measures, which gave the heat raised new issues, otherwise it will greatly affect the performance and life of LED lamps.
At present, the total thermal efficiency of LED lamps is only 50%, there are a lot of power to become hot. Secondly, LED high current density and modular lighting, etc. will produce more concentrated heat, need a good heat dissipation.
In order to improve the heat level we offer the following suggestions:
1), from the LED chip, it should adopt a new structure, new technology, to improve the LED chip junction temperature of heat resistance, heat resistance, and other materials, making the lower heat dissipation requirements.
2) reduce the thermal resistance of the LED device, using the new package structure, new technology, the choice of thermal conductivity, heat resistance, good new material, including the bonding between the metal material, such as phosphor blend, making resistance ≤ 10 ℃ / W or less.
3) reduce the temperature, try using a good thermal conductivity thermal material, the design requires good ventilation channels, spread it out as soon as possible so that heat, warming the requirements should be less than 30 ℃. In addition, to improve the heat dissipation modular lighting level should be on the agenda.
4), the way a lot of heat, such as the use of heat pipes, and of course good, but the cost factor to be considered in the design issues should be considered cost-effective.
In addition, led street lighting Manufacturer in addition to improve lighting efficiency, light requirements, appearance outside, to improve the heat level, the use of materials with good thermal conductivity, there were reports that some nanomaterials coated radiator, its thermal performance increase of 30 %. In addition, there must be better mechanical properties and sealing, cooling the body but also dust, LED lamps require a small temperature rise should be 30 ℃.
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