Up to now putting a light in an above ground pool has been just about impossible. Unlike an inground pool you cannot build one in to the wall. Unlike a wooden above ground pool you cannot drill a hole in the wood to hold the light. There are some lights that you can dangle over the side but they are not very attractive.
The light gets around the problem of cutting holes in the side by being held in place by a magnets either side of the vinyl wall. Not only does the magnet hold it in place but it also induces an electrical current on the inner part to power the LED light. LED lights do not need much power and the 3 watts generated is plenty for the light and makes the light perfectly safe.
The outer part of the light is plugged in to mains electricity, there is a very generous amount of chord. A transformer reduces the current to 12 volts on the outer part so, again, electrical safety is not a problem.
The LED light is suprisingly bright. One light is easily enough to light up an 18ft diameter intex ultra frame pool
If the light ever gets knocked and disconnected from the magnets it will just float to the surface and you can re-connect it.
Inground pool lights are fixed in position but this light can be positioned anywhere you like in your pool.