a smile that can light up a room

It's almost like a hug, but without the touching-another-person bit. To light up a room, one needs more than a good sense of humor, a tank of gas, curiosity, or some matches. They also need to put people at ease…and smiling is the best way to do it.

“guys, seungmin is smiling again! he really has a smile that can light up a room!”