You don't need a light switch or a light bulb or an iPhone app to turn something on or off.

你不需要电灯开关、灯泡或苹果手机应用程序来打开或关闭某些东西。

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In contrast,a light bulb has much more impact in the use phase, where it's using the energy, and where you can reduce that with more efficient lighting technologies,"

VOA: standard.2009.03.30

A muffin serving size is the size of a light bulb.

一份松饼是灯泡这么大

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

You don't need a light switch or a light bulb or an iPhone app to turn something on or off.

你不需要一个电灯开关,或者一个电管,或者打开关闭一个iPhone应用程序。

哈佛公开课 - 计算机科学课程节选

In terms of that last rule, it's time for a light bulb moment for your team.

FORBES

Our eyes prefer full-spectrum analog light: what you get from a light bulb, a fireplace, or the sun.

FORBES: LED Light Bulbs Mature At Last

When they go off the college he expects they will never have seen a light bulb being changed.

FORBES: Selling an Energy-Efficient Light Bulb Is Trickier Than You'd Think