 
Due to web color rendition, color may not be exactly as shown.
Bulb on the left is daylight white; warm white on the right.
Colour temperature is a standard method of describing colours for use in a range of situations and with different equipment. Colour temperatures are normally expressed in units called kelvins (K). Note that the term degrees kelvin is often used but is not technically correct (see below).
Colour Temp °K |
Colour Code |
Common Description(s) |
Comments |
2700 |
827 |
Warm White, Very Warm White |
Similar light to 'normal' incandescent bulbs, giving a warm 'cosy' feel |
3000 |
830 |
Warm White |
The colour of most halogen lamps. Appears slightly 'whiter' than ordinary incandescent lamps. |
3500 |
835 |
White |
The standard colour for many fluorescent and compact fluorescent tubes. |
4000 |
840 |
Cool White |
Gives a more clinical or 'high tech' feel. |
6000 |
860 |
Daylight |
Fluorescent or compact fluorescent lamps simulating natural daylight. |
6500 |
865 |
Cool Daylight |
Extremely 'white'; light used in specialist daylight lamps. |
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