illumination produced by a tubular electric discharge.a semi…

illumination produced by a tubular electric discharge.a semiconductor device that converts electricity into light.a process of mixing colored lights on a surface whereby the wavelengths of each are combined.illumination resulting from the glowing of a heated filament.method of diminishing the wave lengths of light by superimposing two or more color transparencies over the same light source. fluorescent light LED lighting additive method incandescent light subtractive method