Blake~
I have used these battery (4 AAs) navigation lights made for inflatables. I keep them in my tool kit and install them only when I will be running in the dark. I used to rely on a handheld lantern but everybody on LI tells me that bay constables are more finicky these days.
Here's the bow light. It fits into a socket on the central thatch rail up forward.
I mount the stern light in a socket edto the outboard cowling (don't trust suction cups alone - esp. not in freezing weather). The law says the stern light is supposed to be above the head of the helmsman, etc - but I first saw such an installation on a law enforcement vessel. They are out-of-the-way - a big consideration when handling decoys and such.
I will look up the brand and source after my nap (been up since 2:00 AM). I do not recommend the cheaper, D-cell clamp-on nav lights I have seen.
All the best,
SJS