How to use 'light'

'Light' is brightness which makes us able to see. I can't get to sleep when it's so light outside. This is a very light room because of the 12 large windows. 'Light' can be a physical thing that gives brightness, like a lamp or bulb. Let's buy a new light for the hallway. It's too dark. As a verb, 'light' (lit — lit) means to make something bright or burn. Can you light the fire? I'll get dinner ready. As an adjective, 'light' often means not heavy: to travel light. This is a very light bag for a three-week trip!