Not as bright as some LEDs, but bright enough. About 12 ft in length for the lights, and about 20 ft extra for wiring them up. I put them across one side of my 6x12 enclosed trailer, and if they aren't bright enough I can add a second string to the other side. No dead lights upon install, will update if there are any failures. These come with double stock foam tape, but I don't trust the stuff and used a screw through the single hole in each light. I wish those were included, as the tape will almost definitely fail the first hot summer day.