Nice work- I miss doing that....
For some very inexpensive lights- this was my set up years ago.
2- 8ft 2x4's
2 trouble lights- the cheap ones with the silver dome that hold a regular bulb and clamp
2- 12v light bulbs
4- electrical gator clamps
Cut the plug off the lights, wire on the clamps for power. Clamp the lights on the 2x4's, hang them out over the side (I used to stick them in my live wells on my ranger)
Connect to 12v power, and they you have it.
Total cost was about 20 bucks. We used to hang them out either side, I ran the bow mount trolling motor and shot off one side while a buddy stood on the back deck and shot out the other. When bank cruising- put both lights on the same side. Great fun, long nights, and my bass boat was trashed with blood, scales, etc...