LED mr16 50W Replacement Dimmable 4w cool White 6000k LED Light 4X1W 4W Lamp Bulb DC 12V,if you want to have dimmable function , please use DC 12V transformer Driver for dimmer . then the bulbs can be dimmered Dimmable 4w High power LED lamp with mr16 base & Wide Flood 45 degree beam angle cool White color temperature 6000K  200 (cool white) High luminous intensity output: 440LM  10 Higher energy efficiency bulb & Spaced Edge for Heat Sink Cool beam (no UV or thermal radiation), Solid State - Fast Turn-On