How bright is it compared with a normal ceiling light?

It produces 500 lumens at 1 metre from 30 LEDs. That is roughly a strong accent or hallway light, well below a typical mains ceiling fixture, so treat it as supplementary lighting.

Does it work in a room with no window or sun?

The light runs off its battery, but the battery is charged only by the 5W remote panel. The panel needs outdoor sun, so a dark room works as long as the panel is mounted outside and cabled in.

What is the difference between the IP ratings?

The solar panel is IP65, sealed against dust and water jets. The control box is IP44 and the light fitting is IP20, so the light is for indoor, dry locations only.

How does the motion sensor work?

It uses a microwave sensor, which detects movement through the room rather than needing a clear line of sight like a PIR. It switches the light on when you enter and the day/night sensor keeps it off while it is light.

What comes in the kit?

The skylight fitting, the battery box with a 3.2V 6AH lithium battery, the 5W remote solar panel, and 5m cables from panel to control box and from control box to light.

Can I mount the panel on a roof and the light far away?

The supplied cables give 5m from panel to control box and another 5m to the light, so plan the layout around those lengths. Longer runs would need extra cable.