When people install halogen bulb, almost of all cars needn’t to change halogen headlight bulb orientation.

Because the bases of halogen headlight bulb orientation can’t be rotatable.

But for LED headlight bulbs, most bases are rotatable and you need to take care of their orientation.

If headlight bulb orientation is wrong, it will affect lighting output.

In order to make you clearly halogen headlight bulb orientation, I will show you some pictures as below.

If you are still confusing halogen headlight bulb orientation, we can share our ideas each other at any time.