Light colour
The light colour appearance of a lamp can be defined in terms of its Colour Temperature. There are three main colour groups: warm whites < 3300 K; neutral whites 3300 K - 5000 K and daylight whites > 5000 K. Despite having the same colour appearance, lamps may have very different colour rendering properties owing to the spectral composition of their light.
Colour appearances of OSRAM lamps:
The light colour appearance of a lamp can be defined in terms of its Colour Temperature. There are three main colour groups: warm whites < 3300 K; neutral whites 3300 K - 5000 K and daylight whites > 5000 K. Despite having the same colour appearance, lamps may have very different colour rendering properties owing to the spectral composition of their light.
Colour appearances of OSRAM lamps:
| Warm white | Neutral white | Daylight white | |
| Metal halide lamps | WDL= Warm white |
NDL= Neutral white De Luxe |
D= Daylight white |
| Fluorescent lamps Old system (first digit indicates the light colour) |
31 = 3000 K 41 = 2700 K 32 = 3000 K |
21 = 4000 K 22 = 4000 K |
11 = 6000 K 12 = 5000 K 72 = 6500 K |
| Fluorescent lamps New system (the last two digits are the first two digits of the colour temperature. The first digit indicates the colour rendering index Ra) |
827 = 2700 K 830 = 3000 K 930 = 3000 K |
840 = 4000 K 940 = 4000 K |
860 = 6000 K 950 = 5000 K 965 = 6500 K |