Halogen G4 Base T3 Bi-Pin Light Bulbs, 12-Volt A/C or D/C for Accent Lights, for Under Cabinet Puck Light, Chandeliers, Track Lighting, 12V 2 Pin JC Warm White 2900K Dimmable. - Amazon.com
WAC Lighting
Hampton Bay 20-Watt Halogen 120-Volt G8 Clear Xenon Under Cabinet Light Bulb EE714CR - The Home Depot
3W LED Puck Light Recessed Mount QS-RD-COB3W-12V - LED World Lighting