I've seen the britebox, etc for quite a while and I know alot of folks love them. I am gonna draw alot of fire BUT. When I researched converting my headlights one point came up again and again (not just through the TDR): running both filaments of a 9004/9007 type bulb is bad because none of them were designed to take (or eliminate) the extra heat load. From what I read (NOT MY OP. ) no bulb will last as long in that condition. I was convinced to go quad light and get my extra brites from more bulbs doin what each was meant to do!