Wiktionary
lightens up
vb. (en-third-person singular of: lighten up)
Usage examples of "lightens up".
The frame lightens up, and the camera swings around, the wide angle showing Clay's unconscious form and Amy kicking, the regulator out of her mouth, looking at the surface.
Life really sucks sometimes, then it gets better and you get optimistic again, and your heart lightens up a little and you get a little spring back in your step, then somebody pulls the rug out and you’.
And if the surgical schedule lightens up, maybe we can take you earlier.