brightens

verb

1. To make bright or brighter in color.“We brightened the room with a new coat of paint.”
2. To make illustrious, or more distinguished; to add luster or splendor to
3. To make more cheerful and pleasant; to enliven“to brighten one's prospects;  Having Mark around the place really brightens things up.”
4. To grow bright, or more bright in color; to clear up“The sun starts to brighten around this time of the year.  The sky brightened as the storm moved on.”