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Microcap & Penny Stocks : SLS Industries (SLSI) Info (Hold the explosions, please)
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To: crj_ who wrote ()8/22/1998 12:02:00 AM
From: crj_   of 37
 
Link to Using daylight reduce peak electric load.

energyusernews.com

Hilights:

Active daylighting is the term applied to the control of electric lighting to supplement daylight. The goal of active daylighting is to couple photosensors to luminaires in ways that will reduce energy use while optimizing illumination levels for occupant comfort.
New technologies have emerged in recent years that increase the opportunities to apply daylighting techniques cost-effectively. New sensors and electronic dimming ballasts provide distributed control that operates independently to detect conditions in small areas and controls the light from a small number of luminaires in that area.

HID lighting in manufacturing facilities, warehouses, and stores designed with daylighting can be dimmed either with a high-low step-dimming system or a continuously variable system. The lower limit of the control system is determined by the lamp type. Metal halide lamps are not usually dimmed lower than 50 percent to avoid unstable lamp operation. High-pressure sodium lamps can be dimmed to 35 percent
without difficulty. The high-low systems employ a relay that switches an additional capacitor in the ballast compartment. The variable systems often use variable transformers that control large groups of
luminaires. <<Obviously written before dimmable electronic ballasts>>

A well-designed daylighting application may optimistically realize annual energy cost savings of 20-30 percent compared to buildings without daylight design or controls. Electrical energy used for lighting systems can be reduced as much as 70 percent during peak natural light periods.
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