| http://www.w3.org/ns/prov#value | - Thus, if light source 170 were a signal light including red, red-orange, or amber AlGaAs or AlInGaP LEDs, the light emitted from such LEDs would have wavelengths in the range of 585 nm to 660 nm, and conductive thin-film coating 190 would be tailored to maximize spectral transmittance at those wavelengths.
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