This is a 12-volt recessed fixture is commonly refered to as a "Puck-light". It fits into a 2-1/4" diameter hole, and is designed to use up to a 20-watt G4 type halogen bulb.
Model SL-688 (transformer sold separately)
1-49
$20
Dimensions: 2-3/4" D x 9/16" H Finish: Black, White or Chrome Cordset: 18/2 SPT, 6" cord with plug Hole Size: 2-1/4" Diameter Swivel Action: N/A Finish: Black, white or Chrome Bulb:Q20G4 - included (20-watt maximum) Transformer required (E5825 or E5821) (sold separately)
Low profile "push light"
Surface mount option available - Note: not available in white