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| LIGHT DISTRIBUTION DIAGRAM |
You can read a luminaire's luminous intensity in different directions from
a light distribution diagram and it is the value where luminous intensity
is half of the highest value.The values of the light distribution curves are
scaled to correspond to 1000 lm from the light source and are expressed
in cd/1000 lm (candela/1000 lumen). This is why it is possible to show
luminaires with different outputs in a common diagram.
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Symmetrical light distribution
A 28 W fluorescent lamp (2600 lm) gives,
in a straight down direction, approximately
375 cd/klm or 975 cd total.
Asymmetrical light distribution
At a maximum luminous intensity angle
of 25° a 28 W fluorescent lamp gives
approximately 580 cd/klmor
1.508 cd
in total. |
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