hi alfie

i used an old set of roof bars the multi fit sort for a fiesta it just fit across the roof of my fourtrak as it was / is box section covered in plastic with the normal gutter clamps that was the easy bit drilled 5 holes in it to bolt the 5 spotlights through dasiy changed the lights together and p climped and riveted the wires on job done i did add a drop of weld to each of the nut / bolts to stop them being borrowed and a bit more weld to stop the gutter clamps being undone fed the wires through a hole in the outer skin to a different hole on the inner skin (thats the fun bid)down inside the door pillar , fitted a quick disconnect in case i everneed to pull them off routed wires to through easy access fuse holder to heavy duty relay and switchs etc. has worked for me for last 6 months without any hicups but besure to use 35 amp cable dont be temped to use the thin stuff it will just smoke.

one of my buds used standard flat bar for his welded to the roof so there are many ways or you could buy one of ebay with lights already on and convince it to fit

anyway lots of fun
regards
howard