Hi peeps,
You can use the Kayak Deck lights. These are 360 degree all white lights suitable for vessels under 5m. We run moonlight paddles in Perth in summer and in fact have one coming up in 2 weeks time if you are interested. We run them on or near abouts to a full moon. We sell the deck lights or you can get them from Anaconda. $40.
Here is a few pics of previous moonlight paddles before we had the deck lights.