Synergy by Ushio is the combination of patented optical technology, LED packaging techniques, unique electronics and superior thermal management.This 4 watt LED MR16 can replace 20-25W halogen MR16s. Outstanding performance with 80 percent energy savings. Rated at 50,000 hours, Synergy has a true life rating of more than 10 times that of a standard MR16 lamp. Available in spot, narrow flood, flood, and wide flood beam spreads. Lead free, mercury free, UV free. Fully dimmable. Use with only 12VAC magnetic transformers or appropriate 12VDC power supplies.