I have the "eBay" waterproof LED lights on the hull of an RC boat. They will hold up. I use the boat to push our 5' gas boats back to shore if they stall. The boat sits in the water for hours while we run boats and then I take it to a local pond at night and run it for on hour or more on the weekends! Lights have been on there for 3 summers now. All the LEDs still work.

