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.
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Colour appearances of OSRAM lamps:
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Warm white |
Neutral white |
Daylight white |
| Metal halide lamps |
WDL=
Warm white
De Luxe |
NDL=
Neutral white
De Luxe |
D=
Daylight whiteDe Luxe |
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 |
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