Halogen lamps produce light the same way as incandescent lamps - illumination is produced in both when a tungsten filament is heated sufficiently to emit light. Halogen bulbs differ from incandescent by utilizing a fused quartz envelope ("capsule") allowing for higher temperatures which produces the appearance of whiter light (3000K) than incandescent (2700K). In addition a bromine gas inside the envelope promotes longer filament life. LED is increasingly replacing halogen for general lighting, although halogen is still preferred for many specialty applications.
If you need assistance, call 800.784.1998 to speak with one of our lighting specialists.