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Executive SummaryThe Commercial Lighting Solutions (CLS) project directly supports the U.S. Department of Energy's Commercial Building Energy Alliance efforts to aid in the design of high-performance buildings. DOE has launched three CBEAs: the Retailer Energy Alliance (REA), the Commercial Real Estate Energy Alliance (CREEA), and the Hospital Energy Alliance (HEA). The alliances link commercial building owners, managers, and operators, by sector. A primary focus of the alliances is to reduce the energy consumption, greenhouse gas emissions, and operating expenses of member's buildings with the aid of advanced technologies, analytical tools, and capabilities emerging from DOE and the national laboratories.DOE has initiated research to develop a series of flexible Commercial Technology Solutions to identify the low-energy technical pathways of attaining specific energy and economic goals for specific projects. The output is a series of web-based decision tools targeting commercial building design teams. Commercial Lighting Solutions (CLS) is one of these tools, and provides options that can be used in existing buildings as well as new construction and major renovation. CLS creates energy-efficient best-practice lighting designs for widespread use. The lighting solutions are available to users via an interactive webtool that both educates and guides the user through the application of the solutions as well as providing immediate and project-specific feedback on the energy consequences of the various options.In May 2009 version 1.0 of the webtool was released and included designs for box retail. This report, one of two FY10 critical commercial planning system milestones, summarizes the peer review of the beta version of the office solutions for the CLS webtool. Peer review input will be utilized in making improvements to the webtool in preparation for the release of version 2.0, which will include both office and retail lighting solutions. In order to collect the level of detail desired from the peer review process, input was requested from professionals across the range of fields that would use and benefit from the tool. PNNL developed a list of potential reviewers and proactively invited both written input and input from qualitative interviews. Reviewers included (6) owner representatives from the CBEA, (4) lighting designers, (3) lighting manufacturers, (1) architects, (1) engineers, (2) state energyefficiency program managers and (2) utility program managers. Two internal PNNL staff also reviewed the tool for this report. (see Appendix A). The diverse representation of members ensured that all aspects of the tool were analyzed from many perspectives.The methodology for the peer review process included gathering input from interested stakeholders, analysis of the comments, and organization of the comments into categories for prioritization against a set of criteria. Based on this process, PNNL developed recommendations about which feedback will be addressed for the release of version 2.0 of the webtool at the LI...

This document was printed on recycled paper. Executive SummarySolid state lighting (SSL), specifically light-emitting diodes (LED), has been advancing at a rapid pace, and there are presently multiple products available that serve as direct replacements for traditional luminaires. In this demonstration, conventional recessed lights in a conference room were used to compare conventional incandescent A-lamps, incandescent reflector R-lamps, dimming compact fluorescent lamps (CFL), to an LED replacement product. The primary focus during the study was on light delivered to the task plane as provided by the power required by the lighting system. Vertical illuminance, dimming range, and color shift are also important indicators of lighting quality and are discussed in the report.The results clearly showed that LEDs, with dimming-capable drivers, are much more efficient than incandescent and CFLs. Further, LEDs provide much smoother and consistent dimming than dimmable CFLs. On the potential negative side, it is important that the dimming switch be identified as compatible with the LED driver. A wide variety of dimmer switches are capable of dimming LEDs down to 15% of full light output, while select others can be capable of dimming LEDs down to 5%. In addition, LEDs can be intensive light sources, which can result in uncomfortable glare in some applications and to some occupants. Higher ceiling (9-foot or greater) or non-specular reflectors can act to alleviate the potential for glare.Figure E-1 illustrates the results of the dimming tests performed. Incandescent 100-Watt A-lamps were used as the baseline lighting system, which were compared to incandescent 65-Watt R-lamps, 20-Watt dimmable CFL, and 15-Watt LEDs. While the R-lamps are more efficient than the A-lamps, the CFL and LED options were considerably more efficient. The 20-Watt CFL selected did not provide as much illumination as the original baseline condition. This is likely the result of the optics caused by the different lamp shape within the reflector. To match the initial light level of the 100-Watt incandescent Alamps, it is estimated that a 24-to 28-Watt CFL would be required. The 15-Watt LEDs provided more illumination at full load than the baseline incandescent, making the LED the most efficient and effective option, although at a higher initial cost.Table E-1 summarizes the basic annualized operating costs associated with each of the lighting technologies. Incandescent lamps, thought of as an inexpensive item, result in high labor costs (because of their short lamp life) as well as high energy costs (because of their low efficacy). While LEDs are initially expensive, annualized operating costs are expected to be inexpensive as a result of the expected long usable life (50,000 hours). Of course, the expected long life is not yet completely validated because of the newness of the technology.v