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the daylight:controls module dims light as per the set point lux but does it dim the lights to the extent that the total daylight plus electric light lux is exactly equal to the set point value in the case when daylight illuminance is low? or just dims so that the daylight plus electric illuminance together produces lux near set point value? Does the lux measured at the photosensor location indicate that in the entire controlled zone the same lux level is being maintained?
Anyone experienced in daylighting control: If the zone is around 49m in length and 4m deep would one photosensor be effective, placed at the center of the zone, to control electric lights? When I place two photosensors (each controlling 50% f the zone space) along the length or depth of the zone, the savings decrease as compared to using only one photosensor. The lights are never completely shut down even if the daylight lux is greater than set point value.
Posted by: Fakeha Sehar <fakeha_s@xxxxxxxxx>
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