The lights didn’t turn on - I hadn’t installed them but laid them out - I would have to shake them to get them to turn on. Ended up returning.I’m unable to instal wired lights, so this was the next best solution, and I don’t regret it! These hold a charge through most of the night, and seem to respond naturally at sunrise and sunset. The material is a tad on the flimsy side and there is condensation build up inside, but they’re LED so I don’t see this being a problem. I feel like on stairs this would actually produce a decent amount of light!They arrive fast, they charge pretty fast, had them out if tge box at 2pm and 9pm when it was dark all of them turned on. Installation was a breeze, no need of cables or any nonsense, and the best part is that they look modern, they gave my deck a new high end look.