The building was darkened except for a single light burning in a third-storey window.

除了三楼的一扇窗户透出一丝光亮，整栋楼一片漆黑。

《柯林斯英汉双解大词典》

How to light a house with a single light bulb?

如何用一个灯泡点亮一座房子？

youdao

To seize them, companies will need more than a single light bulb going on overhead.

为了抓住机会，企业需要做的要比单单制造一个灯泡多很多。

youdao

A single light bulb hangs above the table. There are a couple of pieces of furniture,small sofas without cushions,and a small table.

VOA: standard.2010.02.23

Finally,a single ray of light shot from out and fell full upon the vulture eye.

VOA: special.2009.05.16

And then,when my head was well in the room, I undid the lantern just so much that a single thin ray of light fell upon the vulture eye.

VOA: special.2009.05.16

They groaned and heaved and slipped in the mud, in a scene illuminated by a single light bulb.

NEWYORKER: Boss Rail

The advantage of the rival NTT technique, says Saruwatari Masatoshi, a senior researcher at the company's Optical Network Systems Laboratories, is that it uses only a single light source.

CNN: THE INTERNET

On a slightly smaller scale, I once went to change a single light in my kitchen and ended up replacing literally every bulb in the house with brand new LEDs.

CNN: Apparently This Matters: Hot tub time