... Hole size:58mm CE&RoHS Certified Item NameCrystal 3*1W LED Downlights ModelSY103BrandLongbiteDimensionD90*H39 Hole size:58mmLED Type1W LEDPower3WLED ... , Western Union Lamps can be used with:GU10,MR16,LED or compact fluorescentApplicable places: meeting room, department store, museum ... hotel, office, etc. Features: Small volume and easy to set. Long life-span,low light decline rate. Good light quality ...