The Book - Häfele

Parameters for the effects of light
Colour temperature (measured in Kelvin) The colour temperature is the measure for the colour impression
of a light source, measured in Kelvin (K). The standard for sunny daylight is 5,500 K, in fog approximately
8,000 K and just before sunrise it is up to 12,000 K. Artificial light imitates various light situations:
The light emitted by a fluorescent tube achieves a colour temperature of up to 5,000 K, halogen light to 3,000
K and a candle to 1,500 K.
Illuminance (measured in Lux)
Illuminance (commonly called light level) is a term that quantifies light incident on a surface. It is influenced
and reduced by the distance of the source.
Light Distribution: This simplified diagram is intended to act as an aid for the planner and shows the light
intensities at a distance of 50 cm, which is applicable to a light in furniture. It was measured in a black box
without ambient light with a standard lux metre. Specified is the maximum value in the centre. The angle can
be calculated based on the loss in light up to half-peak intensity.
12V/1.25W
12V/1.5W
22°
max. 1700 lx
62°
max. 114 lx
50 cm
12V/50W
Order by phone, fax or internet
(P) 1.800.423.3531 (F) 1.888.646-4349
22° 35°
max. 1700 1260 lx
Spotlights for small areas The most popular angle for spotlights is 35°
230V/21W
180°
50 cm
50 cm max. 250 lx
50 cm
Floodlights for soft lighting Fluorescent tubes for surface lighting situations
Lighting
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