ACCU-SCOPE 3253 12V 20W Halogen Bulb - New York Microscope Company
G4 LED Bulbs 12V 20W Halogen Bulb Replacement, HengBo G4 Bi Pin Base JC Type T3 Light Bulb Warm White 3000K for Under Cabinets Home Lights, Non-Dimmable, (Pack of 10) - Amazon.com
Feit Electric 20-Watt EQ T4 Bright White G8 Pin Base Dimmable Halogen Light Bulb at Lowes.com