Low Beams and Highbeams both went out

Well, I tried to replace the dimmer switch before work this morning but stupid Autozone has the wrong switch listed as belonging to the '72 Valiant. I'm gonna track down the correct one tomorrow once I wake up.

After having spent the day thinking about it I remember having a strange power surge in the car about a month ago. It was daylight and raining outside. All of a sudden my wiper blades started moving back and forth and a very accelerated pace. I quickly turned them off. The next day I replaced the voltage regulator and every things seemed fine since then. Now I'm wondering if that surge burnt my headlights out and I'm just now noticing it.