USALight.com offers a wide selection of 12 Volt Halogen and 12 Volt LED replacement bulbs.
Part Number: LJC-CWNon-DimmableWattage - 2w (20W Equivalent)Voltage - 12-25vColor Temp - 4100KLumens - 250lmBase - G4Average life: 25,000 Hours.
Part Number: Orbit LBAY-CWNon-DimmableWattage - 1.6w (20W Equivalent)Voltage - 12-25vColor Temp - 4100KLumens - 200lmBase - BA15SCool White, RoHS compliant.
Part Number: LED712VMR16V41KFLPart Number Description: LED/6.5W/MR16/41K/GU5.3/FLDimmableWattage - 7w (50w Equivalent) Voltage - 12v Color Temp - 4100KLumens - 550lmBeam Spread - 40° Flood Length - 1.8" Diameter - 2.0" 5 year factory warranty (limited).
Part Number: LED712VMR16V41KNFLPart Number Description: LED/MR16/7W/41K/GU5.3/NFLDimmableWattage - 7w (50w Equivalent) Voltage - 12v Color Temp - 4100KLumens - 500lmBeam Spread - 20° Narrow Flood Length - 1.8" Diameter - 2.0" 5 year factory warranty (limited).