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https://greenlivingguy.com/2014/02/philips-spacewise-led-system-selected-to-participate-in-gsas-green-proving-ground-program-for-potential-to-reduce-lighting-energy-and-operational-costs-by-50-to-75-percent/
Philips SpaceWise LED System Selected to Participate in GSA’s Green Proving Ground Program for potential to reduce lighting energy and operational costs by 50 to 75 percent