Judith Jennings

Preliminary Results from an Advanced Lighting Controls Testbed

Preliminary results from a large-scale testbed of advanced lighting control technologies at the Phillip Burton Federal Building at 450 Golden Gate Ave. in San Francisco are presented. The first year objective of this project is to determine the sustainable energy savings and cost-effectiveness of different lighting control technologies compared to a portion of the building where only minimal controls are installed. The paper presents the analyzed results from six months of tests focused on accurately characterizing the energy savings potential of one type of daylight-linked lighting controls compared to the lighting in similar open-planned areas without dimming controls. After analyzing a half year;s data, we determined that the annual energy savings for this type of daylight- linked controls was 41% and 30% for the outer rows of lights on the South and North sides of the building, respectively. The annual energy savings dropped to 22% and 16% for the second row of lights for the South and North, respectively, and was negligible for the third rows of lights.

Residential Lighting: The Data to Date

This report provides background data upon which residential lighting fixture energy conservation programs can be built. The current stock of residential lighting is described by usage level, lamp wattage, fixture type, and location within the house. Data are discussed that indicate that 270% of incandescent residential fixtures are responsible for over 805% of residential lighting energy use, and that justify targeting these fixtures as candidates for retrofit with energy-efficient fixtures. Fixtures determined to have the highest energy use are hardwired ceiling fixtures in kitchens, portable fixtures in living/family rooms, hardwired fixtures in dining rooms, and hardwired fixtures outdoors. An assessment of the market for residential fixtures shows that nearly half of new residential fixtures are imported, about 60% of new fixtures sold are hardwired, and about half of all new fixtures sold are for ceiling installation. 1 “Hardwired” fixtures are those that are wired permanently in place, typically in a wall or ceiling. “Portable” fixtures consist of table, floor, and desk lamps and others that are simply plugged into an ordinary socket and can thus be easily moved.