Light Bulb Colour Temperatures

All fluorescent tubes, compact fluorescent and energy saving lamps are available in different colour renditions, or burning temperatures measured in Kelvin.

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.

For example an energy saving lamp with a colour temperature of 3500K burns at 3500 Kelvin this colour is known as white.

There is a high demand nowadays for daylight lamps which burn at a temperature of 6500K, these lamps are often used to combat SAD (seasonal affective disorder)

Please find below a chart of colour temperatures if you are unsure of the lamp you require please email us on sales@bltdirect.com or call us on 01473 716 418.

Colour Ref.	Colour	Colour Temp.	CR1 Ra
Actinic 03	Special
Actinic 05	Blacklight
Colour 08	Blacklight Blue
Actinic 09	Blue
Colour 10	Blue
Colour 11	Daylight	6500K
Colour 12	Daylight	5400K
Colour 20	Cool White	4000K	67
Colour 23	White	3500K	56
Colour 25	Natural	4050K	73
Colour 29	Warm White	2700K	51
Colour 30	Warm White	2700K	54
Colour 32	Warm White	2700K	93
Colour 33	Cool White	4000K	62
Colour 35	White	3500K	58
Colour 54	Daylight	6500K	76
Colour 55	Northlight	6500K	93
Colour 82	Very Warm White	2700K	85
Colour 83	Warm White	3000K	85
Colour 84	Cool White	4000K	85
Colour 129	Warm White	3000K	53
Colour 133	Cool White	4000K	64
Colour 135	White	3500K	57
Activa 172	Northlight	6500K	98
Gourmet 175	Special	3700K	88
Colour 827	Very Warm Triphosphor	2700K	85
Colour 830	Warm White Triphosphor	3000K	85
Colour 835	White Triphosphor	3500K	85
Colour 840	Cool White Triphosphor	4000K	85
Colour 930	Very Warm Triphosphor	2700K	95
Colour 940	Cool White Triphosphor	4000K	95
Colour 950	Daylight Triphosphor	6500K	95