SDCM – Standard Deviation Colour Matching
SDCM is the parameter describing the light colour matching. SDCM
3 means that all luminaires with a declared colour temperature, will
shine uniformly and the differences between the light of different
luminaires will be imperceptible to the eye.
The difference in colour temperature for a specific SDCM depends on
the colour temperature. SDCM3 for 2700K is 110K and at 3000K it is
150K. With SDCM6 and 4000K, the acceptable difference is as much
as 550K. So it can be 3725K or 4275K!
Cheaper LED luminaires and most of the replaceable LED sources fall
in the range between SDCM 5 or 6, which means that the difference
in the colour temperature of 3000K between theoretically identical
products may be up to 250K. This is kind of variation level that can be
discerned by the naked eye. If you are interested in light compliance,
you should choose luminaires with SDCM 3 or below. Our luminaires
always have 3 SDCM or lower.
Luminous flux
Luminous flux is a quantity that determines the
power of light that can produce a specific visual
impression. This means that it only applies to visible
light. The unit of the luminous flux is one lumen [lm].
LED lifetime
LED luminaires wear out differently than incandescent
or halogen lamps. They very rarely go out and when
it happens it is usually the result of a serious failure
occurring, for example, in the event of an overvoltage
or serious mechanical damage. Usually, they will very
slowly and gradually lose their initial luminous flux as
a result of the slow degradation of the luminophore.
The light sources used in our luminaires have a dura-
bility of min. 50,000 h (which means nearly 11 years of
continuous lighting every day for 12 hours a day).
SCDM 3
high SCDM
95
94
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