Halogen lamp is not incandescent
and halogen due to the inert gas in the bulb by adding halogen
But also because the tungsten wire evaporation easy to make the lamp wall black;
The difference is ordinary incandescent lamp even if the bulb filled with inert gas
Halogen lamps and incandescent lamps are tungsten.
Halogen lamps are a kind of incandescent lamp. Belong to the thermal radiation source.