This performance improvement is provided by adding a simple TRR reflector with an aperture to standard multi-color LED packages. The diameter of the aperture, which determines the amount of recycling, and the total size of the reflector can be scaled to meet the user's needs. "Clearly, with such improvements in performance with minimum change in configuration will find applications in many areas in the entertainment industry and pico-projectors.According to the GSA, energy efficiency is becoming a way of life, not only to cut costs at more than 9,600 assets that it owns or rents, but also to meet the 2007 federal mandate that government buildings slash energy consumption 30 percent by 2015.
To meet those goals, and to push the whole market forward, it launched the Green Proving Ground program to evaluate sustainable building technologies. Based on performance, the GSA can then recommend technologies to its portfolio.The GSA has already published findings on occupant-responsive fluorescent lighting, but now it has turned its attention to LEDs and controls.As part of the Recovery Act, the GSA had more than 200 projects of lighting retrofits, but few were LEDs. “The Green Proving Ground GPG program is looking at the next generation of products that are targeting general office lighting, which is the great frontier,” said Kevin Powell, program manager for Green Proving Ground. The frontier has certainly moved to LEDs, which have come down significantly in price.
Daintree’s ControlScope solution will be used to control existing fluorescent lights in one building and to control Cree’s lights in another building. Powell notes that one of the advantages of LEDs is their inherent controllability, but the agency still doesn’t know if the cost-benefit is right.The point is to see whether or not we can cost-effectively install that at market prices today,” said Powell. But cost isn’t the only factor; occupant satisfaction and maintainability also play a part in evaluating technology.In the case of occupant responsive lighting, the technology saved 27 percent over baseline conditions for spaces illuminated 12 hours a day, five days a week -- and occupants embraced the upgrades. For LEDs, the savings will have to significantly beat what’s achievable with controllable fluorescents to make inroads with GSA.
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