Here are the boat lights, I think one is a 50 watt, and the new one is 75 watt. 12 volt.
Here are 2 gigging lights that my buddy Felix made years ago. That's a light bulb inside of a quart jar, with lead weights. You'd hang the light over the side of the boat, and hook it up to the battery.
For years and years we used a sealed beam headlight, handheld when we were gigging. You get so much reflection if the water is a little bit choppy, or gigging in deep water. These underwater lights are a big improvement! Plus you've got both hands free.
My brother made the 2 little lights above, they are brighter than anything on the market, as far as I know. Just one of those things, Dad has us out on the river gigging suckers, carp and eels since we've been kids, and we still love it!