Dali Lighting Curve - ABB i-bus KNX Product Manual

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ABB i-bus KNX
Planning and application
4.12

DALI lighting curve

The DALI lighting curve is adjusted to the sensitivity of the human eye. In this way, a logarithmic
characteristic curve results for the luminous flux, which is perceived by the human eye as a linear
brightness characteristic.
Note
IEC 62386-102 describes the DALI values as arc power across the light source, which in most cases is
an almost linear relationship to the luminous flux.
The luminous flux describes the lighting power emitted from a light source in all directions. The unit is
stated in lumens (lm).
For the luminous flux under DALI, the characteristic shown in the following illustration is defined compliant
to the DALI standard (EN 60929 or IEC 62386-102):
n = 1...254 (digital control value)
The following DALI characteristic thus results:
= const.= 2.8 %
DLR/A 4.8.1.1 | 2CDC507128D0202 191