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The following measures prevent or
greatly reduce the direct and indirect
reflective glare:
- an ergonomic layout of monitor-based
workplaces and monitors in respect
to the windows (monitor inclination
ä = 15° //direction of view parallel to
the window façade)
- Luminaires with a mean radiant
intensity of = 1000 cd/m2 at a beam
angle of 65°
- A layout of the illumination free of
reflective glare free with respect to
monitors and working surfaces
- An optimal antireflective coating of
the monitor (when possible quality
class 1/1 acc. to DIN EN ISO 9241-7)
- Reduction of glossy surfaces
- Adjustable sunshading when required
UGR
The UGR method takes into account
the layout of the luminaires in the
room and evaluates the glare produced
by the entire lighting system for a
specific observer's position. A low
UGR value means that the glare is negligible
or non-existent.
Suitability examples:
UGR value < 16 for drafting rooms,
< 19 for offices and control rooms,
< 22 for precision industrial tasks and
< 28 for heavy industrial tasks. The
UGR method is implemented on the
basis of simple tables provided by the
luminaire manufacturers. WILA supplies
these tables on CD-ROM or on
the Internet.
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