1, the common fluorescent lamp:
On both ends of the fluorescent lamp with a filament, inside the tubes
filled with tiny amounts of argon and the thin mercury vapor, tube
coated with fluorescent powder, on the wall between the two filament gas
when conducting an ultraviolet, the fluorescent powder making soft
visible light.
Characteristics of the fluorescent lamp, LED street light
began to ignite need a high voltage, normal light allows only by small
current, the voltage is lower than the voltage at the ends of the tube.
On both ends of the fluorescent tube is equipped with a filament, glass
tube wall coated with a layer of thin fluorescent powder evenly and tube
is pumped into the vacuum after the 10-3-10-4 mm hg, filled with a
small amount of inert gas, also injected liquid water trace amounts of
silver. Is a core inductance coil inductance ballast, the inductance of
the nature is when the current in the coil change, will cause the change
of the magnetic flux in coil, thus produce inductive electromotive
force, the direction and the current in the opposite direction, thus
hindering the current changes.
Electric fluorescent starter switch role in the circuit, it consists of a
neon tube and a capacitance in parallel, and the role of the capacitor
to eliminate the power supply of electromagnetic interference with
ballast tank formation, and increase the voltage amplitude of the start
pulse. An electrode in the discharge tube with double metal composition,
using NaiPao discharge heating, make the bimetallic strip when open and
close, cause the inductance ballast current mutation on both ends of
the tube and generate high voltage pulse.
When the fluorescent lamp after access circuit, electric fluorescent
starter began to glow discharge between two electrodes, the bimetallic
strip heat expansion and contact with the static contact extremely, so
the power supply, ballast, filament and electric fluorescent starter
constitute a closed loop, current filament preheating, 1-3 seconds when
the heating time, electric fluorescent starter of glow discharge between
two electrodes, then the bimetallic strip cooling and static contact is
extremely disconnected, when two electrodes disconnect instantly, the
current in the circuit suddenly disappeared, so ballast produces a high
voltage pulse, and it has to do with power superposition, on both ends
of the tube and, make the inert gas ionization inside the tube caused by
arc discharge, in the process of normal light, ballast self-induction
is still stable circuit in current role.
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2, LED fluorescent lamp:
LED fluorescent lamp with high quality, durable, energy saving as the
main characteristics of the projection point of the adjusting range is
big, the brightness of the 15 w is equivalent to ordinary 40 w
fluorescent lamp. High temperature resistance, moistureproof and
waterproof, prevent leakage. Using voltage: 110 v, 220 v optional, outer
garment optional glass or PC material. Lamp holder and common
fluorescent lamp.
LED fluorescent lamp adopts the latest LED light source technology,
digital design, power saving more than 70%, the 12 w LED solar light
intensity is equivalent to 40 w fluorescent tube (for the starter and
ballast, 36 w fluorescent lamp real power consumption for 42 w to 44 w).
The LED fluorescent lamp life for more than 10 times of ordinary lamp,
almost maintenance free, often do not need to change the lamp, ballast,
glow. Green environmental protection of semiconductor lighting, the
light is downy, spectrum pure, is conducive to the user’s visual acuity
protection and health. 6000 k in the cold light source, give a person
the feeling of cool and refreshing on the vision, humanized design
illumination differences, more help to concentrate, improve efficiency.
At present, the LED fluorescent lamp and common fluorescent lamp by comparison, advantages as follows:
1. Energy saving. 2. Long service life. 3. Good applicability, due to
the volume of a single star LED is small, can be made into any shape. 4.
The response time is short, is ns (ns) level of response time, while
the common lamps and lanterns is ms (ms) level of response time. 5.
Environmental protection, no harmful metals, waste recycling easily. 6.
Colorful, light color is pure, narrow spectral range, and can pass the
red, green, blue three primary colors mixed color into 7 colour or white
light.
Disadvantages: 1. The price is expensive. 2. Now can do general theory
of efficiency and light efficiency also has the very big disparity. 3.
Now can do life and theory of life also has the very big disparity (10 w
hours). 4. There is a certain calorific value. 5. Light failure need to
shrink significantly.
But through technology improvement to overcome these shortcomings can be, so even if the LED street light
source can not completely replace the traditional light source, but
with the development of technology, must be LED the world in the future.
More info you can visit:http://www.lighting-ledlight.com
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