0007
0006
SLV LIGHTING
KNOWLEDGE
LUMEN
CRI
COLOUR
TEMPERATURE
The luminous flux (indicated in
Lumen) describes how much
light is emitted in all directions
by a light source. It represents
the overall brightness perceived
by the human eye. The efficiency
of a luminaire is often given in
Lumen per Watt. The higher the
luminous flux (in Lumen) per
power consumed (in Watt), the
more efficient the light source
The colour rendering index is
the impact of a light source
on the colour of an object as
perceived by the human eye
compared to a natural source of
light (e.g. sunlight). According
to EN 12464-1, indoor spaces in
which people spend or work for
longer amounts of time should
have a colour rendering index
(CRI) of >80.
The colour temperature of a light
source is indicated in Kelvin (K).
The higher the colour tempera-
ture, the cooler and more stimu-
lating the light (e.g. daylight =
5500K). The lower the Kelvin
figure, the warmer and cosier
the light. The colour temperature
of a 2700K light bulb is now
recommended as the perfect
home lighting. The CCT switch
allows the colour temperature
of a luminaire to be adjusted.
DIM-TO-WARM
(DTW)
TUNEABLE
WHITE (TW)
RGB
RGB+W
The dim-to-warm feature lets
you adjust the colour tempera-
ture and brightness of the light.
The light colour changes from
cool white to warm white when
dimmed down, but cannot be
controlled any further.
The Tuneable White function
allows you to set the colour
temperature of LED lights as
desired. The light can be
adjusted to suit different times
of day and moods.
An RGB-compatible luminaire
covers the entire colour spectrum
from red, green and blue with
the white balance in the back-
ground. The white balance of the
RGB+W is also optimised and can
be represented in pastel tones.
