Commonly used in caravans and motorhomes for downlights, ceiling lights and reading lights, the G4 is a glass lamp with 4mm pin spacing.
Commonly used in caravans and motorhomes for spot lights and reading lights, the MR11 incorporates the halogen lamp with a 35mm diameter and 4mm pin spacing.
Sometimes used in caravans and motorhomes for spot lights and reading lights, the MR16 is a glass reflector incorporating the halogen lamp with a 50mm diameter and 5.3mm pin spacing.
T10 Wedge Base Tungsten
Mainly used in fifth wheelers or American RVs, it is a glass lamp with a 10mm base with wires bent back over the glass base rather than extending down like the G4 above.
For spot lights and reading lights, these tungsten filament lamps are commonly used in caravans and motorhomes, with a 15mm diameter bayonet base and can easily be replaced with a LED.