I was led to a small room bathed in soft red light.

我被领进了一个被柔和的红光笼罩着的小房间。

《柯林斯英汉双解大词典》

The five line, all connected to electricity, such as LED does not light, LED will be the main line of the red position can be exchanged.

线全部接上，通电后如LED灯不亮，则将LED的主线的红绿位置对换即可。

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Previewing by red light, focusing by double red lights, and equipped with LED lighting.

单红光预览，双红光对焦，配备LED照明。

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In another bypass, they insert a wire into a silicon cover for an LED light that blinks red when the user enters an invalid code.

FORBES: Defcon Lockpickers Open Card-And-Code Government Locks In Seconds

In this case, Richardson combined a couple of Arduino circuit boards with an infrared LED light -- that little red bubble on the front of your TV remote -- and programmed the whole thing to interact with a TV's closed-captioning system.

CNN: Hacked TV remote will auto-mute Snooki

Generally LED bulbs use either a combination red, green and blue LEDs to create white light, or they use a phosphor coating (more common) in combination with a blue LED.

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