The G4 halogen is one of the most common lamps used in caravans and motorhomes and is easily identified as a small glass lamp with two short pins spaced 4mm apart. The G4 halogen is commonly used in ceiling lights, wall lights, downlights and reading lights and is easily replaced with an LED alternative. This disc type LED G4 is used to provide light in one direction and are best used in downlighters, ceiling lights and spotlights. The 3-LED back pin is designed to replace a 5W halogen when it sits straight back into the light fitting. We also have this 3-LED G4 as a side pin version and the same style with a larger number of LEDs if a higher output is required.