Philips 20-Watt T3 Halogen 12-Volt G4 Capsule Dimmable Light Bulb (2-Pack) 417204 - The Home Depot
SHELLTON G4 LED Bulb 2W Equivalent to 10-20W Halogen Bulb T3 Type Led G4 bi-pin Bulb AC/DC 12V Daylight 6000K for Candle Base Light Outdoor Landscape Lighting, 10-Pack, Warm White - Walmart.com
20W 12V T3 G4 Halogen Clear Bulb 2-Pack by Bulbrite at Lumens.com