OSRAM QUICKTRONIC INTELLIGENT DIM CFL - Manual (Page 25)

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The dependency of the relative luminous flux X (n) on the digital 8-bit
value n is described by the following correlation:
3
253
1
10 ) (
−
=
n
n X
! . % 8 , 2
) (
) 1 ( ) (
Const
n X
n X n X
= =
+ −
This results in the following graphical association:
Figure 13: DALI dimming curve
2.7.1 Brief overview of the most important dimming values
Table 3: Values of digital dimming value against percentage luminous
flux
As not all DALI controllers start at 0.1 % luminous flux, the smallest
value for DALI ECG is 85 for example (corresponds to 1 % luminous
flux). All values below 85 (except for 0 = off) are interpreted as the
minimum light level. To ensure that the transitions from one digital level
to the next are not visible, DALI ECGs from OSRAM feature digital
“smoothing" (this is an additional function of the QTi for increasing
lighting comfort and is not part of the DALI standard).
percentage luminous flux 0 0,1 0,5 1,0 3 5 10 20
digital dimming value 0 1 60 85 126 144 170 195
percentage luminous flux 30 40 50 60 70 80 90 100
digital dimming value 210 220 229 235 241 246 250 254