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Backlights are lights that are attached to LCD displays so that they can be seen at night. They come in many varieties, like white and blue/green. White lights are usually small light bulbs attached to the side of the display, and are not homogenically distributed. Blue/green lights are produced by a paper on the back of the display and are homogenically distributed.

They differ from frontlights because they illuminate the LCD from the side or back, where frontlights are in front of the LCD.

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