Light Bulb Colour Temperatures

To help understand it all, this page has some useful details to guide you through it.

How it all works

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).
View the chart of colour temperatures below, and if you are unsure of the lamp you require please email us on sales@bltdirect.com or speak to one of our friendly experts on 01473 716418.

What is CR1 Ra?
This is the Color Rendering Index (sometimes referred to as CRI), more details here.

Colour Reference	Colour	Colour Temperature	CRI Ra
Colour 29	Warm White	2700	51
Colour 827	Very Warm Triphosphor	2700	85
Colour 30	Warm White	3000	54
Colour 83	Warm White	3000	85
Colour 129	Warm White	3000	53
Colour 830	Warm White Triphosphor	3000	85
Colour 930	Very Warm Triphosphor	3000	95
Colour 23	White	3500	56
Colour 35	White	3500	58
Colour 135	White	3500	57
Colour 835	White Triphosphor	3500	85
Gourmet 175	Special	3700	88
Colour 20	Cool White	4000	67
Colour 33	Cool White	4000	62
Colour 84	Cool White	4000	85
Colour 133	Cool White	4000	64
Colour 840	Cool White Triphosphor	4000	85
Colour 940	Cool White Triphosphor	4000	95
Colour 11	Daylight	6500
Colour 54	Daylight	6500	76
Colour 950	Daylight Triphosphor	6500	95