Okay kiddo, do you know what a roof is? It's like the top of your house that keeps you dry when it rains. Now imagine if there was something on top of the roof that lets in more sunlight and makes the house brighter. That thing is called a roof lantern!
A roof lantern is basically a window that's on top of the roof. It's made of glass or sometimes plastic and it's designed to let more natural light into your house. Sometimes, it's also called a skylight.
Roof lanterns are usually found in big fancy buildings like museums or government buildings. But some people also like to put them in their homes to make them look more elegant and to brighten up their rooms.
So next time you see a really bright room, take a look up and see if there's a roof lantern letting in all that sunlight!