Pureglare Projector Lamp 5059905874 / DE.5811100.173 / BL-FP280A for 3M AD50X / OPTOMA EP774, EW674N, EW677, EX774N Ampac Audio-Video is the only authorized seller of PureGlare lamps. ?Look for Ampac Audio-Video to ensure you're buying an authentic PureGlare Lamp.? PureGlare Compatible Lamp with 150 days warranty