Abstract:
A vapor discharge lamp which produces visible light energy and energy in the middle and near ranges of the ultraviolet region of a quantity from between about 6 to 50 and 150 to 700 microwatts respectively per lumen of visible light produced.
Abstract:
Electric lamps having spectral radiation characteristics approximating natural daylight with a controlled amount of energy in the near and middle ultraviolet ranges which also produce light of sufficient intensity and proper color to make them usable as general illuminants.