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A key feature of King Street Center’s energy-efficient lighting plan was to place most enclosed offices on the interior core of the building, allowing the open office area to maximize the available light from the perimeter windows. Motion sensors turn off the lights if staff are not detected. The system uses high technology 2x4 indirect fixtures, supplemented by task lighting at employee desks. The lighting system also uses controls that dim the lights at the perimeter when they sense enough light coming in from the outside. These features allow the building to operate at a total of approximately .86 watts per square foot, 28.4% more efficient than required at the time. The current State of Washington Energy Code allows designers to use up to 1 watt per square foot.
In fact, this building currently has the most energy efficient lighting system in the City of Seattle and provides a model for designers and consultants working on new buildings. The design was chosen as a Seattle City Light Power Player and was honored at the second annual Energy Conservation Achiever Awards Ceremony. The building was also recently awarded the EPA 2001 Energy Star Award.
Light Fixtures: Lightron products were used throughout the building.
Specs: 2-lamp, T-8 indirect 2x4 with high output ballast, 3500 degree Kelvin color temperature used as primary office lighting fixture.
Resource savings: Overall design 28.4% more efficient than under allowable WA State energy code, .86 watts per square ft. usage
Lighting Designer: Lambda Lighting consultants
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