The color temperature (light colour) of the lamp has a major influence on the atmosphere in a room. Every light source is composed of spectral colors. The sum of these colors results in a (different) white, which is perceived as «warm», «neutral» or «cool». The unit of measure for color temperature is Kelvin (K).
We offer bulbs from 1800 Kelvin (very warm) to 3000 Kelvin (neutral). Illuminants with 2200 Kelvin come closest to the original tungsten illuminants in color appearance.