Most efficient warm-light LED
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By combining a series of colored filters, it is possible to create the world's most efficient warm light LED.
The tube-shaped lamp will be the first to attain 200lm/W while still maintaining a high quality of light. To create the warm light, one red LED will be combined with two blue, then a green filter will be applied. It will convert one of the blue LEDs to green. This process will result in a warm light with more than twice the lumens per-watt of conventional LED bulbs.