good luck....both mine in my 7.3 have burnt out and sometimes neither work in my 5 year old truck...try backing up at 25' trailer in a field at 8-9pm at night with no lights around you and bulldozer on one side and 2 year old dump trailer in the spot next to it, it sucks....the light they throw out is amazing i was telling everyone about them but then they started having issues, im going back to regular bulbs, I have 0 time for UNRELIABLE lights especially working in landscaping and DEPENDING on them like i do my 7.3 powerstroke and 6.4 and they both start every single morning no matter what.