They work pretty well I went offroading saturday night with them on it lit up the trail nicely almost like daytiime.
The only issue it's hunting season out here too many lights may piss the hunters off.
I did have a tree fall on the truck wheeling saturday it broke one of the Hella 550's we jb welded the light and let it sit overnight.
 I was able to put it back up there on sunday and so far so good.
I may have to do a alternator upgrade sometime though my 980 CA Optima seems to be handling it though.