The room brightened enough for Piemur to see clearly.

The room brightened, but not as much as Theo had expected.

The room had brightened further with the advancing dawn.

The room brightened again with light from the display volume, but it had changed.

The room brightened for a moment as thunder chased lightning past the window.

In the twelfth second, the room behind them brightened, roaring.

He lighted it, and the room brightened with a warm, yellow glow.

She reached for the lamp, and with a turn of the switch the room brightened.

He crossed the room and the light suddenly brightened.

I guess she'd decided to make me feel at home, because as she stood there the room brightened.