Like other reviewers, I agree these are heavy, seem well made, very simple to attach, etc. But, I wanted to make a note to others who may be looking at these and reading reviews (this is an actual review). I put these on my dock boards because the crab deck needed a bit more lighting for walking at night. The downside is my dock is low to the water, so when the tide comes in during a storm (we live on the gulf), it comes over the deck boards. We had about 3 inches over the lights about 3 weeks ago for a few hours. I checked the lights for moisture, couldn't find any and all 12 lit. Today we had a bad storm, very high tide, water over the dock about 8 inches, lights submerged for 6-8 hours. Every one is lit tonight. I plan to buy more of these. I bought a set of 12 originally. I'm pretty impressed. Had they quit working, or some of them, I would have understood. But, all are still working. I plan to update this when/if any go bad, but so far, even when submerged for hours in salt water, they are still working.