light up

Once they start treatment, they light up when they walk in the room during their first appointments, she said.

The mollusk lights up using bioluminescence when threatened to distract predators, researchers said.

In Scotland, landmarks install red lights as part of a nationwide "light up red" campaign.

Three years later, Fulton’s face still lights up when he thinks about one of the best plays he’s ever seen.

He added: "Smoke has filled the air and flames are lighting up the faces of those who've come to watch, while faint echoes of drumming come from over the hill."