So-called LED lamps, as the name suggests, refers to the lighting products using LED (Light-emitting Diode, light emitting diodes) technology as the main light source.
LED is a solid state Semiconductor components, its clockwise circulation using current semiconductor p-n junction coupling, then by the semiconductor separatednegatively charged electrons and positively charged hole after the two carriers combined, and photon emission, different types of LED can emit infrared rays to Blu-ray, between different wavelengths of light, such as with violet to ultraviolet light. In recent years, new development is coated with phosphor in the Blu-ray LED, blue LED into a white-light LED products. This operation generally requires matching driver (LED Driver) or power supply (Power Supply), the driver or the power supply's main function is to convert AC voltage to a DC power supply, and at the finish line with LED of voltage and current to drive line components.
LED lamps of bulb volume is small, the weight is light, and epoxy under high mechanical shock and vibration, not easily broken, and brightness degradation cycle is long, so its service life of up to 50,000-100,000 hours, well over 1,000 of the traditional tungsten lamp hours and fluorescent lamps of 10,000 hours. Since LED lamp life of up to 5 years, so not only can greatly reduce the cost of lamp replacement,because of its minimal current to drive light emitting characteristics under the same lighting conditions, power consumption of only fluorescent lamps one-second, LED also has a power-saving and energy-saving advantage. However, because partof the LED technology is not enough, so initially used in the luminaire's weakness including light quality (color rendering, consistency, color temperature) is poor, heat is not easy, and the price is on the high side, and improper heat dissipation, willcause the LED lighting brightness and circuit components using life to speed up decay. With the manufacturing technology in leaps and bounds over the past decade, these shortcomings, including LED thermal resistance decreases, the light qualityis in Ascension. In 2008, apart from LED Bai Lengguang the luminous efficiency of up to 100 LM/w, warm white LED luminous efficiency, expected in 2010, but also from the current 70 LM/w up to 100 LM/w. Compared with other common light sources, about 15 LM/w tungsten lamp, fluorescent lamp is about 45~60 Lm/W, HID lightsAbout 120~150 Lm/W,LED in luminous efficiency is clearly taking advantage.
Following is a lamp for LED lamps and other common comparisons:
White LED light source, wide operating environment, smaller, less resistant to vibrations, concentrated beam.
Daylight (fluorescent) light fluorescent energy saving, waste issues such as mercury pollution in fragile.
Incandescent tungsten bulb low efficiency, high power consumption, long life is short and fragile.