|
LIGHTING DESIGN: the real success of a well-designed control building
rests on attention to details, such as the design and installation of lighting and interior finishes. Lighting at the consoles
should be arranged to eliminate glare and reflections in the VDU screens.
|
With conventional CRT based consoles,
such as these Yokogawa consoles for Star Petroleum in Thailand, CRD developed lighting that precisely illuminated the worksurfaces,
yet allowed the CRT's to fall in the shadow - thereby making the displays much more legible.
|
|
Each operator should have independent control over the illumination level for
his console. CRD prepares a detailed 'glare & reflection study' based upon the particular console type specified, as a
basis for final light fixture placement and dimming, as shown above, in the lighting plan for Valero's Texas City refinery,
in affiliation with BPMSA architects of Houston, Texas.
|
Certain console manufacturers, like Evans, offer task lighting to further supplement
the overhead lighting. In all cases, however, it is important to: eliminate all reflections on the screens by NOT positioning
overhead luminaires behind the consoles; avoid forward-looking 'direct glare' produced by flat diffusers on fluorescent fixtures;
provide capability of dimming down to levels approximately 150 to 350 lux (15-35 ft. candles) for periods of monitoring or
during normal operation.
|