I have deben/lightforce 170 set up on the roofbar that sticks on the roof with suction ...
hate the idea of sticking a big hole in the roof.... cables long enough to clip straight to battery so no fag lighter fuses get blown.
Lamp and handle can be stuck in roof if you want
75 quid all in if collected..can meet at scotch corner.. think there's a spare filter for it and poss lense.