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Consists of a small light source that emits colored light (usually red, but also green, yellow, blue and white) from a very small amount of electricity and is used for electronic "message" signs. These signs became popular in the 1970s because they were inexpensive and allowed scrolling/changing messages to be used in commercial applications. Advances in LED technology have made them more useful for interior and exterior message displays. See also electronic message signs.
LED LIGHTS
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