Halogen light headlights means those bulbs are all put halogen gas inside.

Our h1,h4,h7, h8, h11, 9005, 9006 and other car halogen light headlights are all put Crypton gas inside, so our halogen light headlights bulbs are all good life time.

If don’t put gas inside bulbs, cooling system of halogen ligth headlight bulbs means nothing.

Although mixxed gas of halogen light headlights is sky price at the present, my factory still insist on using it.