This Calex 1.3W capsule is an energy saving alternative to an 11W halogen capsule. This G4 capsule has an impressive 20000 hour life and is dimmable to 50%. With its cool operating temperature it is ideal for reading spot and pendant lights. Please note G4 capsules are recommended to be used alongside a constant voltage LED driver to maximise both the lumen output and the life of the bulb.