I use this solar light designed for outdoor use in homes, as a security light and cockpit lighting when using the bbq etc. It has three settings, on, motion detector security light, and off. I am a live aboard so the security setting is perfect for me. The on mode provides plenty of light in the cockpit. Two screws mounted it perfectly to my outboard motor bracket. It comes with a plug in solar panel (see picture). One charge will last a week or more on the security setting and several days with the on setting and no drain on your boat batteries!. It is a Sunforce 82101, 100 LED, Solar Motion Light. Got it on Amazon for $46.50. Several people on my dock liked it so much that they also purchased one. I have had it several months and no sign of weathering or rust.