2012年6月29日星期五

super high power led in low temperature

1, What is the low temperature lighting?
Low temperature lighting refers to the use of artificial light source to light, the ambient temperature below 5 ° C venues, such as refrigerators, freezers, refrigerators, cryogenic plants, outdoor lighting. The low-temperature lighting to fluorescent-based, and now the LED street light (super high power led) source in the low-temperature lighting place.
super high power led in low temperature
2, the fluorescent lamps used in low lighting
Although the fluorescent lamp in a conventional room temperature, the luminous efficiency up to 90lm / W regarded as a high-efficiency light source, but when entering the low illumination environment, whether it is the luminous efficiency, illumination or aesthetic design shows more disadvantages. Even though some manufacturers have introduced a dedicated low temperature fluorescent lamps, to solve the problem of the luminous efficiency, but still can not take into account the illumination and aesthetic requirements. And the price is very expensive. At low temperatures, ordinary fluorescent light-emitting efficiency and even to be halved, and life will be shortened. Even without considering the nonuniform illumination of fluorescent lamps at low temperatures, but also consider the fluorescent light color and color rendering the problem of inadequate, because it can not show the best colors of the goods, can not achieve the purpose of attracting consumers .
3, LED Products used in several major advantages of low temperature lighting
Compared to CCFL fluorescent lamp cold light source, LED  (super high power led) used in low temperature lighting, or has a special advantage. First, LED, even at low temperatures of minus 40 degrees Celsius, can achieve instant start and requires no special circuit or programming. LED luminous efficiency is almost unaffected in the low temperature and may even be better than the normal environment. The three LED is a point light source, with a small, point to the characteristics of the optical arrangement in accordance with the design requirements for refrigerated cabinets, display and other places. And the LED can provide sufficient uniform illumination better to see the product label. Fourth, the LED light color, color temperature, color rendering of the variability can be based on different lighting requirements for different products, select the appropriate LED light source, to achieve the purpose of attracting consumers. Is the difference between LED and CCFL power supply before CCFL must first after a buck DC / DC converter, it will wear out the 10% electricity, wear out 25% of electricity through the Inverter, and finally to Fluorescent tube of power about only 70%. But the LED Lights just after the LED  (super high power led)  Driver will be able to direct transmission of power, so that the efficiency of the transformer circuit to up to 90%, with a larger energy-saving advantage.

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