Publications

Energy-efficient LED Downlights at the Bidwell Mansion Visitor Center

05/01/2010

The Bidwell Mansion Visitor Center (BMVC) was retrofitted in two installments. The first phase focused on the foyer and restroom, where 16 LED recessed downlights were installed. In the foyer, 14 downlights with a 10" aperture that operated with two 13 W bi-pin CFL lamps and magnetic ballasts were replaced. In the bathroom, a 3' T12 fluorescent strip light was replaced. Before the retrofit, illuminance levels, at grade, varied from about 1 footcandle (fc) to 25 fc. Average maintained illuminance levels for the foyer and restroom were 14 fc and 9 fc.

Energy-efficient LED Downlights

05/01/2010

Recent studies estimate more than 800 million recessed downlights are in operation in the United States, split nearly equally between residential and commercial applications, with about 83% still using incandescent lamps. Inexpensive compact fluorescent lamp (CFL) downlights are commercially available, but most of these units are not dimmable, which is a desired attribute for many downlight applications. Therefore, energysaving CFLs often are overlooked in lieu of the functionality of incandescents.

Bi-level Street and Parking Area Luminaires at Cal Poly San Luis Obispo

05/01/2010

PIER-sponsored research, development, and demonstration has focused on the combination of occupancy-based lighting controls and broad-spectrum light sources to create intelligent, bi-level luminaires designed for street and parking area applications. These products achieve 30 – 75% energy savings compared to traditional street and area luminaires, meet stringent energy-efficiency standards, and provide excellent light distribution for reduced night sky pollution. 

Advanced LED Downlights

05/01/2010

Lighting California's Future – The Advanced LED Downlights project takes downlights in a whole new direction—up! The LCF project partners developed a dimmable downlighting system based on indirect optical design that reduces glare, decreases installation time, averages LED color variations and improves thermal management. 

Integrated Office Lighting System at UC Office of the President

05/01/2010

Six private offices and 44 open cubicle spaces on the ninth floor of the University of California Office of the President Franklin Building in Oakland, CA, received an IOLS retrofit in 2009. This site was selected because it provided a large, open office space, a high-occupant density, and expected long-term employee occupancy in the space.

Super Lamp Initiative

03/01/2010

LD+A – The strategy is to foster the development of high-efficacy light sources that achieve, as much as possible, interchangeability with incandescent lighting, in terms of compatibility with electrical infrastructure and with popular lighting expectations. This article is a summary of CLTC research aimed at developing a technology-neutral Super Lamp specification for replacement of incandescent sources in the residential sector.

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