I have them on my boat. I would describe them as "a good value" Likely not as bright as many of the other options available at much higher prices. I have 4 of the singles and it lights up the back of the boat nicely but only for about 10 feet. I have seen other higher end lights do much more impressive jobs. But mine are just for decoration and kids like catching stuff off the swim platform so they serve their purpose. I've had mine for two full seasons and they are holding up well. I have never had a problem but the guy who owns the place is rummored to be very responsive to any problem/issue. If I were to do it again I would go for 4 of the double units for more light but other than that am pleased. As for installation, they are surface mounted. Each has a wire that needs to be led into the boat. My boat was previously drilled in the transom for another light. So I just used the existing hole. On my model year Tiara, the transome is cored to proper proceedure of drilling out a larger diameter hole, filling with epoxy and then redrilling smaller hole is very important.
