A sliver of light showed under the door.

门底下现出一丝亮光。

《牛津词典》

The light was on and the door was open.

灯亮着，门开着。

《柯林斯英汉双解大词典》

They left the door only partly open, for too much light might drive the ghost away.

他们只让门半开着，因为太多的光可能会把幽灵赶跑。

youdao

And of course it exists in a semiotic relationship to a white light over a street door which means "this is my house; if you wish you can ring the bell but I'd just as soon you stayed out."

当然它是存在于一个语义篇中的,而临街门上的白灯则意味着,这是我的房子，你要进来必须按门铃,但是你最好别进来“

耶鲁公开课 - 文学理论导论课程节选

Obviously, it doesn't mean "come in" in the sense of the red light over a street door.

当然，它不像临街灯一样表示,进来吧。

耶鲁公开课 - 文学理论导论课程节选

All right. Just some other examples: a red light over a street door.

好吧，现在让我们看看例子：,临街门上的红灯。

耶鲁公开课 - 文学理论导论课程节选

Everything was covered with a thick layer of grime, from the old fashioned metal light fittings to door handles and banisters.

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We found someone to install a motion detector light outside her front door, to improve her safety at night.

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Kraft opened the door, and the light gleamed off the three shiny, silver footballs.

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