Save energy with LED, how to replace halogen G4 lamps by LED G4 in existing downlights - YouTube
Amazon.com: Dimmable G4 LED Light Bulbs, G4 Bi-Pin Base Lamps AC120V(Do Not Fit 12V Low Voltage) 2.5W(25W Equivalent) 260 Lumen Warm White 3000K for Home Lighting Landscape Light Ceiling Lights Chandelier, 6-Pack :
G4 Base Lamp Batten Holder Socket Cable Halogen LED Bulb Down Light Fitting|Tool Parts| - AliExpress
G4/GU4 Fitting/Lamphouder - LED MR11 - LED GU4 lampen
G4 1,5w led lampen 12v in 2700K warm wit en 4000K Neutraal wit - Ledlampaanbiedingen.nl