He touched a control, and the lamp brightened.

The glow from Kirk's carbide lamp brightened as he turned up his water drip, then swung around until it faced the cave specialist.

The lamps, all ceiling inlaid, could dim or brighten at the touch of a button.

The light settled on a lamp, and the lamp brightened, casting its glow across the shadows.

The lamp brightened, illuminating the whole chamber.

The lamp would brighten.

The blue lamps flickered, went dark and then brightened again.