但灰灯和黑灯马上就会出现。

But brownouts and blackouts would soon begin.

youdao

背景的反射光可能会造成画面出现死黑区域，为避免出现这种情况，应在被摄主体周围布满灯、柔光罩和反光板，事实上起到柔光棚的作用。

Reflections from the background can reproduce as black dead zones. To prevent them, build a de facto light tent around your subject by completely surrounding it with lights, diffusers, and reflectors.

youdao

里面很黑，什么也看不见，只有一盏煤气灯照亮了石灰墙上的一片地方，别的全隐没在更黑的阴影中。

It was very dark inside: I could see nothing except a flaring gas-jet that illuminated a patch of plaster wall, throwing everything else into deeper shadow.

youdao