Propane lanterns work when hug over the side of the boat. LED lites from Cabela's are available and are dropped to the bottom of the lake. Flourescent lights with a battey and an inverter could work also. The last time I went out I used my camping lanterns and we picked up a dozen perch fishing till 11:00 PM. When the blue pike were around we fished till 3:00 AM and caught them by the hundreds in cold waters.