The use of light and dark symbolizes good and evil.

用光明与黑暗来象征善与恶。

《牛津词典》

And this acrobatic, multimedia performance termed "the Butterfly Effect" relayed age old messages of dark forces battling the light and evil versus good.

在这个叫做“蝴蝶效应”的杂技式多媒体表演中，传播了古老的信息，即黑暗势力与光明做斗争，邪恶与善良作斗争。

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This five day festival celebrates good over evil, light over dark.

在这五天的节日里，正义战胜了邪恶，光明战胜了黑暗。

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That's because it's here where the rigid polarities between light and dark and good and evil, all of these absolute oppositions, begin to collapse.

这是因为这里就是光与暗,善与恶之间严格的两极分化，及所有绝对的对比开始崩塌的地方。

耶鲁公开课 - 弥尔顿课程节选

Again we sense this instinctively--the pleasure we feel when a tooth stops hurting reminds us that we live our life in contexts and contrasts, and so perhaps you can argue that only by witnessing, and confronting, great evil were the forces of light able to burn most bright.

CNN: The necessary evil?

Known as the 'Festival of Light', it celebrates good over evil and ushers in the Indian New Year.

CNN: Quest for the festive spirit

Tell them that it was a mistake for Google not to put a red light indicating that a photo or video is being taken, and that you hope there will be one in future iterations (even though evil folk may find a way to somehow disable the light).

WSJ: Google Glass: An Etiquette Guide