Save energy with LED, how to replace halogen G4 lamps by LED G4 in existing downlights - YouTube
Feit Electric 10-Watt Bright White (2700K) MR11 G4 Bi-Pin Base Dimmable 12-Volt Halogen Light Bulb (6-Pack) BPQ10MR11/HDRP/6 - The Home Depot
6 Pack G4 GX4 Bi Pin Tower LED Capsule Light Cluster Bulb AC DC 12V 24V 2-Pin Fitting Lamps Replacement for 10W JC Halogen Spot Lamp Bulbs of Vehicle & Any Low