"You know better than to light up in this house, Michael."

He'll stop to light up in the middle of a fire fight.

It does mean that students are allowed to light up in class (no one has yet), but within limits.

They all lit up in the middle of the night.

Then her eyes lit up in that way they had.

First one, then all the others lit up in the same colors.

They would light up in different sequences first, one at a time.

However, her face lit up in a smile when she heard his voice.

Her face lit up at once in response to my questions.

Do you know how many times they lit up in that movie?