Bridging many, many threats, complaints and issues we have all stressed. I have tested four different bulbs and given many Amazon's seller's good graces and the site's liberal return policies, i have been able to cycle through several of them. Right now i am on Sealight 3's which i thought were the best of the bunch so far. After seeing a posting about the location of the headlight aim unit, and how i had thought my bulbs were properly seated in the holder i did 2 things. One both bulbs are now in the proper 3 and 6 orientation in the housing. Second i tinkered with the aim lowering them and adjusting. All i can say is WOW!!!! No more dead spots, proper lighting front and sides. Like a different car. I see everyoen complaining but not many people properly aiming their lights.