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You know what?
LED lamp than conventional halogen bulbs car consumes only 1/10, better energy saving, high load protection circuit current car is not burned.
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Advantages:
[123 ] high brightness, low power consumption, long life, small size
· lighting without delay
simple structure, stability and shock resistance
high quality light is substantially no radiation “green “light source.
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Disadvantages:
· high cost, generally have this luxury car item configuration.
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Principle:
light emitting diode , it is a solid state semiconductor devices, which can be converted directly into electricity to light. LED’s heart is a semiconductor wafer, the waferA bracket attached to one end, one end of a negative electrode, a positive electrode connected to the other end of the power supply, so that the whole wafer is encapsulated epoxy. The semiconductor wafer is composed of two parts, a portion of P-type semiconductor, hole in it dominates, the other end of the N-type semiconductor, here is mainly electrons. But when the two semiconductor connected, to form a “P-N junction” between them. When the current through the wire when on the chip, electronics will be pushed P region, electron hole recombination, and then will be issued in the form of photon energy in the region P, which is the principle of LED light. The wavelength of light that is the color of light, is determined by the material forming the P-N junction.
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reading:
[ 123] 
matrix LED is an LED light source disposed in a matrix manner, and gain control. In each unit matrix LED headlamps new A8 family, the reflecting unit 5 arranged in a beam lighting assembly, in the above each reflecting unit 5 is small LED light source, LED light source may be small pieces each individual point light, dimmed or turned off, a total of five groups of small LED light source 25 are mated together, can achieve area in front of the variable, accurate illumination. Theoretically, the pair of LED matrix can achieve high beam illumination over 960 million kinds in combination.