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James LoveField Performance of Daylighting Systems With Photoelectric Controls Faculty of Environmental Design, The University of Calgary, Calgary T2N 1N4, Canada Abstract Performance of daylight-linked fluorescent dimming systems installed in three large commercial buildings was examined through monitoring, site inspections, and interviews with building operators. In all cases, interior daylight levels were excessively reduced through the use of low-transmittance glazing and low-reflectance interiors. In one building, a doubling of lamp life was experienced, presumably due to operation at reduced voltages. It is concluded that group control of individual offices presents many serious difficulties for building operators. Alternative approaches are discussed.
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