This would really depend on the type of LED headlight bulb that you buy. There are a lot of DOT approved LED headlights these days that have a dimmer control option. If you happen to buy these kinds of headlights, then you can use it with a dimmer control. However, there are also some LED headlights that don’t have a dimmer control option. If you buy these ones, then you obviously can’t use it with a dimmer control. You may check the box or ask the salesperson if the LED headlight that you’re interested in is dimmer compatible or not.