LED (Light Emitting Diode), LED is a solid-state semiconductor devices, which can be converted directly into electricity to light.

LED Bulb The heart of the LED is a semiconductor chip, the chip attached to one end on a bracket, one end is negative, the other end to connect the power supply positive, so that the whole chip is epoxyencapsulated. Semiconductor chip consists of two parts, part of P-type semiconductor, the hole in it the dominant, the other side is N-type semiconductor, in here is mainly electronic. But neither of these semiconductors, when connected between them to form a "PN junction." When the current through the wire act on the chip, electronics will be pushed to the P zone, with the P zone electron hole recombination, and then will be issued in the form of photon energy, which is the principle of LED light.

LED Underwater Light The wavelength of light determine the color is determined by the material forming the PN junction. LED (Light-Emitting-Diode Chinese meaning for light-emitting diode) isa way to convert electrical energy into light energy of the semiconductor, it changes the energy-saving lamps and incandescent tungsten light emitting three basic principles of dye, while the use of electric light. According to the analysis, LED very obvious characteristics, long life, high luminous efficiency, no radiation and low power consumption. LED spectrum is almost entirely concentrated in the visible light spectrum, the luminous efficiency of more than 150lm / W (2010 years). The LED and incandescent lamp, spiral energy saving lamps and T5 fluorescent trichromatic comparison, the results showed that: ordinary incandescent light efficiency of 12lm / W, life expectancy less than 2000 hours, spiral energy saving lamp luminous efficiency of 60lm / W, life less than 8000 hours, T5 fluorescent lamps compared with 96lm / W, life is about 10,000 hours,while the diameter of 5 mm white LED light effect can be more than 150lm / W, life can be more than 100,000 hours. It was also predicted that the future of LED lifetime limitwill be infinity.