I have one of firefighter's harnesses. It is well made, and the lights, both high and low, work better. Unfortunately, I would constantly get flashed by oncoming drivers. My headlights are adjusted properly. I believe it partly had to do with drivers seeing all four bulbs lit. You could cook a turkey with the high beams. They were awesome. I had to unplug the inboard bulbs. I also did not want to get pulled over and get a ticket. I plan to rewire it so the inner lows do not come on during low beam activation. By no means is this firefighter's fault. I selected to have all four bulbs illuminate on low. Lights are still way better than originals, and the headlight switch no longer gets hot. I'm sure it will last much longer. Thanks firefighter