I reckon that it has a lot to do with the water you hunt and the speed you need to go.
I agree that those 10/15million candlepower lights are super, but, out where I hunt, they take a soaking because it rarely gets cold enough to snow, or freeze, so they are subjected to a terrible soaking each time we get out.
That being said, I have been really happy with an old 15 watt bike light I got about 10 years back, I blew through 1 water bottle style battery and sent the thing back for a new battery and it is still as bright as hell. I even rig the thing up on my motorbike for freeway use in the fall.
I just ordered 2 more 55 watt 4x6 floods to go along with the 2 floods I already have. Going to mount them on the bow and light up the night.
I have also heard that you could get a ticket for having blinding lights on your vessel, but, there'd have to be someone to blind, and someone to issue the ticket... and I have never been stopped mid shipping channel by the Sheriff or the C.G. and would damned well be hard pressed to run by moonlight when we have none.
If I have moonlight, then Ill just run nav lights and the stern light, but I rarely get that, so I'll just keep well lit.