Fetching details from the dictionary...

light; bright; well-lit; well-lighted
bright (colour)
cheerful; bright; spirited; sunny (e.g. disposition)
bright (future, prospects, etc.); rosy; encouraging; promising
knowledgeable (about); familiar (with); well versed (in); well acquainted (with)
fair (e.g. politics); clean; impartial
この部屋は明るいね。
This room is bright.
明るいうちに帰ったほうがいい。
You should go home while it's still light.
部屋を明るくしたら気分も明るくなった。
When I brightened the room, my mood also improved.