You can get cheaper ballasts of eBay and xenon burners aswell both for pritty cheap I got some bulds there before had a problem with them cutting out but it generally the bulbs going not the ballasts. I got 10000k bulbs super bright great light dispersion aswell but don't last asking as OEM ones but are 1/10 the price $8 for two so I just bought 6 pairs one pair lasts about a year.