| http://www.w3.org/ns/prov#value | - Thus, a substantial portion of the light emitted by the LED 30 passes through the cover panel 100 to produce the lighted sign 90. [0037] While the invention has been described as including an LED 30 that emits light of a certain wavelength, a person having ordinary skill in the art will realize that LEDs 30 emit a narrow distribution of light, typically in the visible portion of the spectrum.
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