k3lind-
Here's a couple of photos of my set up where the remote controlled light is mounted up on a stainless plate welded across the forward top of the bow pulpit":
Photo 1
Photo 2
The light is mounted there so that there won't be any night blinding glare off the pulpit as you get when the light is mounted up on the roof or radar arch. The point here is that if you're searching for a really hard to spot buoy or something else in total darkness, glare off the bow pulpit or any other chromed or light colored surface "blinds" you because of it's relative brightness in the foreground. In all truth, however, most of the time most people are not in situations where this is critical, but when you are, you'll appreciate not having the glare.
The remote controlled lights are not cheap. The one I've got is about $400-$500, but others can be had from about $250 up.
If you go this route, you'll have to have someone weld (unless you fabricate it yourself and screw or rivet) it in place. Depending on who you can find to do the job, I'd guess it would cost $50-$100 to have a metal shop or rail shop do the job.
The electric wires for my searchlight are ducted into the tubes of the bow pulpit and then lead down through one of the bases into the cabin next to the helm, with the controls next to the wheel. You can see most of the control panel behind the wheel and below the windlass line counter in this photo:
Photo 3
Other approaches include paining or covering the bow pulpit with something black when you anticipate using a roof mounted light, or using a hand-held searchlight held out the window.
I also have flood lights mounted on the roof fore and aft, as well as a hand operated search light to the rear. They can be seen if you follow the very first photo link above for the next several photos in the album. All very useful depending on the situation. Side floodlights are next! Light up the night!
I also have a 7,000,000 candlepower portable search/flood light that works off a rechargeable battery and/or lighter adapter that cost a whole $25 at Costco and is much brighter than the $500-600 solution, but much harder to use by yourself.
Others will hopefully point out their set-ups and photos to you.
Try putting "searchlight" into the search engine on the home page here and on the C-Dogs site, and you'll find more details also available there!
Good Luck! Joe.