L Manual

54
Figure 36: This is achieved by a reduction of the system power.
Figure 37: Even so the luminous flux of the luminaire hardly de-
creases because the level of efficiency of the system increases due
to the temperature limitation.
Figure 38: The clear rise in the relative light output shows that the
temperature limitation has a positive effect on the energy saving of
hot luminaires.
Measurements using an example of a narrow 2x80 W luminaire:
The precise scaling depends on the type of luminaire and the installa-
tion conditions of the ECG.
T
a [°C] Tc [°C] Telko [°C] Licht [%] Pn [W]
0 68 70 110 165 110 110
5 73 75 115 165 115 115
7,5 75,5 77,5 116 165 116
10 78 80 115,0 165,0 115,0 115,0 115
15 78 80 109,5 152,9 106,5 109,7 110
20 78 80 104,0 140,7 98,1 104,4 105
25 78 80 98,5 128,6 89,6 99,1 100
30 78 80 92,9 116,5 81,2 93,8 95
35 78 80 87,4 104,3 72,7 88,5 90
40 78 80 81,9 92,2 64,3 80,6 85
45 78 80 76,4 80,1 55,8 71,8 80
50 83 85 71,4 80,1 55,8 66,8 75
55 88 90 66,4 80,1 61,8
0
10
20
30
40
50
60
70
80
90
100
110
120
0 5 10 15 20 25 30 35 40 45 50 55
Rel. output [%]
thermal management without limitation of the temperature
with thermal management
Abscissa: Luminaire ambient temperature [°C]
0
10
20
30
40
50
60
70
80
90
100
110
120
0 5 10 15 20 25 30 35 40 45 50 55
Rel. luminous flux [%]
thermal management without limitation of the temperature
with thermal management
Abscissa: Luminaire ambient temperature [°C]
0
20
40
60
80
100
120
140
0 5 10 15 20 25 30 35 40 45 50 55
Rel. light output [%]
thermal management without limitation of the temperature
with thermal management
Abscissa: Luminaire ambient temperature [°C]