LED replacement bulbs, the options get better and cheaper - Panbo
Led G4 Bulb, Warm White
Best to Buy (6-Pack) Brightest 2.6-Watt G4 LED Bulb 12V AC/DC, 13 SMD 5050 LED, 3W White Color (Jc10 Bi-pin 12w Replacement) Black vertion - Amazon.com
Daylight LED G4 Bulb 12V 24V 2W 3000K Warm White Light 160lm
Best 10pcs G4 LED Bulbs JC Bi-Pin Base Light Bulbs 3W AC/DC 12V 20W-30W T3 Halogen Bulb Replacement Landscape Bulbs(Warm White 3000K) - Walmart.com