If you mount a flood/spot light bar on your windshield grab rail the glare from the front deck will blind you at night.
Mounting one on the bow or on a cooler as was shown is probably the best way of doing it but it being so low to the water you lose depth, or the distance you can see at night.
Our solution after much deliberation, testing and cussing was to do away with the spot/flood light combo and buy a light bar that was spot only...it has a tighter beam and to mount it on the burn bar. The one we went with is 30" wide.
Had to keep the burn bar low enough so that anything on top wouldn't interfere with getting the boat inside a 12' door at the boat barn lol. Hence we broke the anchor light off the top and replaced it with a fold over anchor light...problem solved.
Works great, no glare on the deck and you can see a long long way at night on the water.
This is the best picture I have right now that shows the light on the burn bar.
TH