Philips Lighting Indoor Furnishings TL5 Manual De Usuario
Effects of lamp diameter on beam width and luminaire efficiency
These results illustrate the effects of a smaller lamp in the same
optics:
• a 6 to 9% increase in efficiency of the luminaire
• a smaller, hence more effective, light distribution
• a higher central intensity even when using a 28 W instead of
optics:
• a 6 to 9% increase in efficiency of the luminaire
• a smaller, hence more effective, light distribution
• a higher central intensity even when using a 28 W instead of
a 32 W lamp
Absolute light distribution of a ‘TL’D and a ‘TL’5 lamp in reflector 1.
Note the 25% increase of of maximum intensity by use of ‘TL’5
compared with ‘TL’D in the same narrow beam reflector.
Note the 25% increase of of maximum intensity by use of ‘TL’5
compared with ‘TL’D in the same narrow beam reflector.
8
2000-11-07
Figure 2.4: ‘TL’D
(cd)
180
°
0
90
°
60
°
30
°
90
°
60
°
30
°
γ
600
1200
1800
2400
γ
= 0
°
/180
°
γ
= 90
°
/270
°
Figure 2.5: ‘TL’5
(cd)
2400
1800
1200
600
180
°
0
90
°
60
°
30
°
90
°
60
°
30
°
γ
γ
= 0
°
/180
°
γ
= 90
°
/270
°
Beam width
Max. intensity
Efficiency
‘TL’D
‘TL’5
‘TL’D
‘TL’5
‘TL’D ‘TL’5
°
°
cd
cd
%
%
Reflector 1
2 x 19
2 x 12.5
1920
2433
78
82
(narrow beam)
Reflector 2
Reflector 2
2 x 27
2 x 20.0
1557
1829
73
80
(medium beam)