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Colour Temperature

Although most lamps emit “white” light, this can vary from a cosy “warm” white to a “cold” white according to the “colour temperature” of the lamp. The following chart shows the code numbers used for some of the most popular types:-

Colour Temp °K Colour Code Designation Application
2700827Warm White
Very Warm White
Interna
Similar light to “normal” incandescent bulbs, giving a warm “cosy” feel
3000830Warm WhiteThe colour of most halogen lamps. Appears slightly “whiter” than ordinary incandescent lamps.
3500835WhiteThe standard colour for many fluorescent and compact fluorescent tubes.
4000840Cool WhiteGives a more clinical or “high tech” feel.
6000860DaylightFluorescent or compact fluorescent lamps simulating natural daylight.
6500865Cool DaylightExtremely “white” light used in specialist daylight lamps.
 
Colour Temperature Codes (for illustration only, colours may not be exact)