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Proceedings Paper

Evaluation of light-emitting diode lamps: a report to the city of Albuquerque
Author(s): Marlene Brown
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Paper Abstract

Sandia assessed white LED lamps for parking lot, security and bike path lighting for the City of Albuquerque. Powering these lamps with photovoltaics was of particular interest to the city. Eight commercially available lamps were tested; one was AC and all others were 12-volt DC. Because DC-only photovoltaic systems do not regulate output voltage, a 12-volt nominal photovoltaic system can see a voltage range from 10.5-15.3 volts. Therefore, the LED lamp must be specified for the DC voltage range expected with a photovoltaic system. We found several failed lamps at the high voltage range of our test, which is below voltages that can be seen in the field. In addition, LED lamps need to be more powerful and cost competitive, and temperature and lifetime issues need to be addressed in order to be more widely useful with photovoltaic systems for illumination applications. We concluded that presently available white LED lighting powered by photovoltaics could be considered for bike path lighting applications where the area is remote, or for security lighting in areas that are difficult to access. We do not recommend LED lamps for much larger flux levels such as parking lot lighting at this time.

Paper Details

Date Published: 5 December 2001
PDF: 11 pages
Proc. SPIE 4445, Solid State Lighting and Displays, (5 December 2001); doi: 10.1117/12.450045
Show Author Affiliations
Marlene Brown, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 4445:
Solid State Lighting and Displays
Ian T. Ferguson; Yoon-Soo Park; Nadarajah Narendran; Steven P. DenBaars, Editor(s)

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