A single bulb may produce up to forty leaves in good conditions.

He flipped on the light to add to the single bulb of the door opener.

The light was a single bulb dangling from the ceiling.

The room beyond was dark with only a single bulb hanging from the ceiling.

It was very dark in there, the only light reflected from a single bulb outside the entrance.

It was lit by a single bulb in each front corner.

It was lighted by a single bulb above his head.

And when he did, only a single tiny bulb went on in the lamp beside the bed.

Water came from a well, light from a single bulb.

The single bulb hanging from the ceiling was the only light.