Do you know what’s difference between haogen headlights and incandescent?

I would like to explain to you as below.

Halogen headlights always put halogen mixed Crypton gas inside bulbs, but incandescent without halogen gas inside.

Although halogen mixed gas is very expensive at the present, my factory still put it inside our halogen headlights.

I would like to attach pictures of halogen headlights and incandescent as below.

If you are still confusing halogen headlights and incandescent, you can contact me at any time.