People who have the hobby of photography, might have some intuitive understanding of this brightness difference. If you are shooting with fixed aperture and ISO, your exposure times could easily go from 1/60 indoors to 1/3000 outdoors which is not quite a 100X difference, but close.
Not just the difference between indoor and outdoor light, but also the incredible variations between a sunny day in the summer and a cloudy day in winter. There's a pretty incredible difference.
