The color temperature of a light, measured in kelvins, is its most noticeable characteristic. A candle, at 1900 K, appears orange. Daylight, at 5500 K, is much whiter and bluer. A 5500-K bulb, however ...
It's official. You can go to Underwriter's Laboratories to get a Zhaga LED module certified as to compliance with that standard's specified dimensions, photometric dictates, and other parameters. UL ...