And so there's some of the different types, but what about the shapes and sizes and different designs of skylights? I would imagine there's quite a variation of that as well.

Yeah, absolutely.

I mean, every house is different.

Every roof's different from the ceiling to the roof covering, like the tiles or the tin.

It's all a different height.

So that really determines the shape and the size of the skylight that we use.

And then with the tubular skylight, they basically come in two sizes, so a 250mm and a 350mm.

where's the most common room of a house where people are requesting to get a skylight put in?