Earlier this week my passenger side headlamp burned out. I went to the auto parts store to purchase a replacement. I thought about it for a second, I could have purchased the two pack for $8 more–but since only one light was out, what was the point? At home, I replaced the lightbulb, turned on my headlamps to test it all out–and the other one burned out. So I got in the car, headed to the auto parts store to purchase another bulb.
In short, replaced both bulbs and now I can safely drive at night.