What do "cool white" and "warm white" mean?The Color Correlated Temperature (CCT) is given in the description of each of our white led bulbs. The color (CCT) of our white bulbs ranges from a warm yellow (2700K) to a cool blue white (7000K).
By comparison, a typical incandescent bulb has a CCT of 2800K. A typical halogen is a bit higher, maybe 3500K. Daylight white is 4500K and a cool white fluorescent is 6000K or more.
The human eye adapts to background light so that even a daylight white bulb will look slightly blue in a room illuminated mainly with incandescent bulbs. Similarly, an incandescent bulb will look very yellow in midday sunlight. We are now using the following color names to eliminate a lot of the confusion people have had: Cool White, Warm White, Amber. Cool White is sometimes known elsewhere as White, Winter White, Pure White, Clear, Snow White. Warm White is sometimes known elsewhere as Soft White. Amber is sometimes known elsewhere as Candlelight, Antique Candlelight, Yellow, Gold. This picture are showing the different lighting between warm white and cool white.
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