I had (2) 8' on my 2000 Yukon in place of the factory fogs and it ran off the stock system just fine, but if you think a bigger bar might be to much for it then you can still use the factory switch and just run a relay very easy to do and it takes the stress off the factory system, the relay just makes the factory button a on/off control.I have pondered this idea. Although I was thinking of using the factory fog light wiring. Does anyone know if the wiring/relay system would be heavy enough for such a lightbar? Pro's and Con's of using this set up?