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Clackamas High School

Image 001clackhs - The environmental lighting design concept for Clackamas High School was to utilize electric lighting at lower-than-standard levels as well as daylighting, and to provide a control system that could track electric lighting usage on a room-by-room
basis. The electric lighting design met those challenges by utilizing T5HO fluorescent lamps, ceramic metal halide and compact fluorescent downlights, automatic continuous dimming, occupancy sensors and photocells.

Image 002clackhs - Two rows of indirect, single-lamp T5HO fluorescents were used in each classroom, spaced 17 feet on centers. The row along the window wall switched on or off in response to a photocell, while the row along the corridor side was continuously
dimmed. Window wall luminaires do not come on during daylight hours.

Image 003clackhs - This is the same space at night.

Image 004clackhs - During the day, no artificial light was needed or used in the upper corridor.

Image 005clackhs - One row of two-lamp T5HO wall mounted luminaires provided approximately 20 footcandles of illumination during daylight hours.

Image 006clackhs - All other daylighted spaces operated on the same principle, with photocells turning off artificial light when it was not needed. The result was that many spaces in the building used no electric light at all during the day.

Image 007clackhs - This is the same space at night.

Image 008clackhs - A central computer system records electric lighting use and will not allow end users to turn on lighting if enough daylight is present.

Image 009clackhs - This is the same space, shown at night. The innovative, sustainable lighting design allowed this 265,000 square foot to operate at levels 40% below the requirements of the Oregon Energy Code.