Demonstration of LED Lamps at Bonneville Power Administration Headquarters in Portland, Oregon
This report describes the process and results of a demonstration of solid-state lighting (SSL) technology in the lobby of the Bonneville Power Administration (BPA) headquarters building in Portland, Oregon. The project involved a simple retrofit of 32 directional track lights used to illuminate historical black-and-white photos and printed color posters from the 1930s and 1940s. This simple changeout of lamps has raised the visibility of the lobby’s historical photos and posters and improved their appearance. Even though the color temperature was around 2700K for all three lamps, color quality improved with the switch from fluorescent to LED lamps. Power quality also improved with these LED lamps, although that may be a function of the electronics design of these lamps, rather than a feature of LED lamps universally.
This demonstration offered several lessons in directional LED lighting. For accent lighting, replacement lamps should be compared on the basis of light distribution, rather than just lumens or watts. LED replacement lamps can improve color quality and power quality compared to compact fluorescent. Good-quality LED replacement lamps are more economically viable in spite of their high initial cost, when the cost of replacing burned out bulbs is high, hours of operation are extensive, or artwork presentation and preservation is a priority. It is also important at this stage in product development to see several samples installed before committing to a large order or specification of replacement lamps.
Pacific Northwest National Laboratory
U.S. Department of Energy
Bonneville Power Administration
2010 - 2011