Keep burning out headlights on a gator 150. They will get real bright and then go back to normal. Do that for about a week then they'll both go out at the same time. Someone said voltage regulator. Any thoughts?

Anything electrical allways start with the ground. From the battery forward each circuit. My experience has been you'll find your problem.

Definitely sounds like the voltage regulator.

Yes. The voltage regulator controls how much power is being distributed. It would be a good place to check. Keep in mind always check the simplest thing first.