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1 watt 9 volt three chips SMD phosphor based white LED. Among the challenges being faced to improve the efficiency of LED-based white light sources is the development of more efficient phosphors. As of 2010, the most efficient yellow phosphor is still the YAG phosphor, with less than 10% Stokes shift loss.
The "warmer" light colors, such as a 2700 K incandescent bulb or a 1700 K candlelight, are more easily reproduced than more neutral white lights, such as 4800 K direct sunlight, and thus usually have higher CRI ratings in alternative light sources such as CFL and LED bulbs; "warmer" light (redder) naturally renders colors less accurately.
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For the rest of this comment I am going to assume an LED is a single P-N junction. Regarding reverse voltage: Most if not all LED manufacturers will list an absolute maximum reverse voltage as 5V. Yet, many people are driving LEDs directly from an AC power line (120V or 240V) with a resistor for current limiting.
This 34-port, round-trip cruise offers a Northern Lights Promise, from October 1 to March 31. If, during your round-trip voyage, the Northern Lights are a no-show, you’ll get a new 6 or 7-day ...
Unisex Beanie with The Light Light up evening strolls and late-night dog walks with this unisex beanie featuring a built-in LED light. It's even waterproof so you can wear it in all weather!
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