XD1260/55

Halogen bulbs contain a gas mixture which consists of Halogen compounds (usually compounds of iodine or bromine). Light is produced in much the same way as by an incandescent bulb, however, when particles burn off the filament, they are returned by a chemical process involving the Halogen in the bulb.

This means that the light produced by a Halogen bulb is relatively consistent over the course of the bulb’s entire service life. About 30% more efficient than an incandescent bulb.