Originally Posted by H-Rambler25
Jim, All the LED bulbs have Kelvin Rating as to color and brightness.
The Kelvin scale pertaining to light has to do with color temperature. An incandescent bulb is usually rated at 2700º to 3300º K. Fluorescent tubes are 5000º K. Photographic flash is usually rated at 5500º to 6000º K. It ranges from the low numbers being orange to yellow, blue green, then blue white. Since we grew up with candlelight (1800º K)
and incandescent light sources, we tend to feel more relaxed in color temps of 3500º K or less. Fluorescent and Mercury lights are more blue-green and we use them for work or public places.
Kelvin scale has nothing to do with brightness
. Brightness is usually measured and reported in lumens
. It can alternately be labeled in lux, watts, candela, or candles. The European Union in 2010 ruled all lamps (bulbs) sold in Europe must be labeled in lumens.
Pay attention to Kelvin rating and lumens, color descriptions, 'warm white', 'pure white' etc. are subjective and not accurate measures.