LEDs are Non-Dimmable

LEDs are Non-dimmable, These are not going to be compatible with your dimmer switch, so be sure to double-check that everything is going to be compatible and will function to your standards.

LED MR16 Spotlights Specifications
Type of BulbsLED Bulbs
SocketsGU5.3
Wattage3.1W = 35w (Equivalent Incandescent lamp)
Voltage12 V
FinishFrosted
Lumens345 Lumens
ShapeMR16
ColoursWarm White 
Average Lifespan25,000 Hours
Bulb FeaturesNon-Dimmable
CertificationsCE UK/CA
DimensionL: 45 mm X D: 50 mm
Beam Angle36 Degrees