It only lights up for two hours and turns off while it still has battery, so it is useless - the purpose was to light up the whole night or as long as its battery lasts - you have to fish it out and turn it on every two hours.

Simply amazing. Charges during the day and works as follows.

It has a light sensor and turns on at dusk by itself. No matter how much you try to turn it on during the day, it will only light up for a few seconds and then turn off. Be careful because the daylight reflects on the glass while the outside environment is darker, so it recognizes the lighting from the reflection and does not turn on. It needs a little more darkness to understand it. So it will light up a little later. We're not talking about hours, mind you. I say this because I would enter the room at dusk and while watching the sunset, I would wonder why it doesn't turn on. It just needed a little more darkness.
Buy it without fear.

The white color illuminates our pool very well with dimensions of 4×2 m and a height of 1.22! The series with the colored lights is more for effects and not for lighting! Very good though for its price!