SANSUN 2.4W LED MR11 Light Bulbs, 12v 20w Replacement, Fiber Optics Christmas Tree Bulb, G4/GU4/GZ4 Bi-Pin Base, Soft White 3000K, Non-Dimmable, (Pack of 4) - Amazon.com
2PK - GE 20w 12v G4 Bi-Pin Base T3 2750K Halogen bulb – BulbAmerica
Bulbrite 20W 12V MR16 Halogen Flood BAB Bulb | BAB | Bulbs.com
BAB C 20W 12V MR16 Halogen Landscape Light Bulbs by Lumenivo - Dimmable Indoor Flood Halogen MR16 for Use as Fiber Optic Tree Light Bulb, Track Light Bulb - GX5.3 / GU5.3