The Moonrays 20-Watt Halogen Bi-Pin Replacement Light Bulbs are compatible and ideal for 12-volt low voltage landscape lighting. This 2-pack of 20-watt, 12-volt halogen bulbs have an average lifespan of 3,000-hours, a G4 base, measure just over 1 in. overall length (33-millimeters) and have a 300-lumen rating. These JC Type halogen light bulbs are low voltage halogen capsules with pins on the base. These bulbs will burn longer without sacrificing light output, display crisp white light, provide excellent beam control and offer high-lumen maintenance.