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LED Explosion-proof lamp, light emitting diode, is a solid-state semiconductor device, which can be directly converted into light. LED lamp fin heart is a semiconductor wafer, wafer is attached on a bracket, and the other end is negative, the other end is connected with the power supply of the cathode, the wafer is epoxy resin package up. Semiconductor chip is made up of two parts, a part of which is P type semiconductor, in which the hole occupies the dominant position, and the other end is N type semiconductor, which is mainly electronic. But when these two kinds of semiconductors are connected, they form a "P-N knot" ". When the current through the wire is applied to the wafer, electrons will be pushed the p region, in the p zone electron hole with compound, and then in the form of photon emit energy, this is LED light-emitting principle. The wavelengths of light determines the light color, is by the formation of p-n junction LED (Light-Emitting-Diode meaning in Chinese is a light emitting diode) is a can converts electrical energy into light energy of semiconductor, it changes the principle of tungsten filament incandescent lighting and energy-saving lamps trichromatic fluorescent powder of light, and the electroluminescence.

According to the analysis, the characteristics of LED are very clear, long life, high light efficiency, no radiation and low power consumption. The spectrum of LED is almost exclusively focused on the visible light band, and its luminous efficiency is more than 150lm/W (2010). Will tricolor LED with a common incandescent lamp, spiral energy-saving lamps and T5 fluorescent lamps were compared. Results showed that ordinary incandescent light efficiency 12lm/W life less than 2000 hours, the light effect of the spiral energy-saving lamps for 60lm/W life less than 8000 hours, T5 fluorescent lamps is 96lm/W. Life is about 10000 hours, and diameter is 5mm white LED light effect theory can be more than 150lm / W, and the service life can be more than 100000 hours. It is also predicted that the future of the LED life limit will be infinite.

However, the working principle of LED light bulbs makes in high power LED lighting industry in heat dissipation problems become very prominent, many LED lighting solutions, not enough attention to cooling, or technical level is limited, so the mass production of the high power LED lamps widespread actual service life is far less than the theoretical value, the price is lower than the embarrassment of traditional lamps and lanterns. In order to improve the service life of the LED lamps and lanterns, truly suitable for commercial production, LED lighting industry is independent or and professional heat conduction material supplier cooperation stepped up the development of a new type of conductive materials, such as conductive plastic and so on high power, generally refers to are greater than, this not with inter company will have different standards, because the current in the field of high power LED has not formed unanimously approved industry standards. Intensity and lumen ratio small power high, but the same heat dissipation is also great, and now high power mostly single application, coupled with effective radiating area of the great heat sink, also appeared in the integrated together led lamp matrix, but heat dissipation effect is not very good. Small power is generally about 0.06W. Now LED flashlight is generally used in small power, light does not come loose powder, depending in LED emitting angle, large angles, small angle scattered, large angle before dispersing.