I ordered the Linkind Smart Solar Pool Lights, a set of two, and they arrived quickly. At first, I hesitated to install them since we’re replacing our liner soon. I assumed they’d need to be permanently mounted because the kit included glue, screws, and other hardware, but it turns out there are multiple installation options for different pool types. After reading the instructions and downloading the app, I’m pretty happy with them, though I still haven’t figured out how to make the musical notes appear. The app is fun to use with lots of features to explore, and the colors are really nice. I secured the light on our 18' x 54" Cape Cod pool with a couple of screws at the top. The magnet holding the bottom light is impressively strong. I first tried attaching the system to my ladder with the crank, because it wouldn’t fit on top of the pool without screws, which I ended up using later anyway. I programmed the app to turn on at 8 p.m. and off at 2 a.m. They won’t turn on if it’s still light out but will once it’s dark. However, they didn’t stay on until 2 a.m.—when I woke at 1 a.m., they were already off—so I’m not sure how long they last after a full day of Florida sunshine charges the solar panel. Overall, I like them, though the price feels a bit high, and I’m unsure about their longevity, as only time will tell.