This is a problem that should not be 'taken lightly'. [=this is a problem that should be treated seriously]
Considering the harm he did, he's 'gotten off lightly' with only a warning.
Our troops were armed too 'lightly' to take on the heavily armed invaders.
(..) didn't make the top of the list. Guys, just do me a favor, okay? Come up with one thing that's important to you about Ben. That's it. It could be a poem or a lightly choreographed dance number. Don't be afraid to go modern. I think Ben would appreciate it. Fine. Or you could (..)2010 TvShow: Scrubs Title: Our Thanks Season: 9 Episode 13