Osram Decostar 35S halogen MR11 spotlight cool beam dichroic light bulb with 38 wide flood beam for general purpose lighting.Closed version with glass front to reduce possibility of contamination and for increased safety.Due to the small size (11mm diameter) of this halogen MR11 spotlight - this light bulb is often used in decorative fixtures such as ornamental optical decorations and optical Christmas trees.This spotlight lamp is fitted with a low voltage 12V GU4 2-pin (4mm apart) base.