| http://www.w3.org/ns/prov#value | - The foregoing objects, features and other advantages are obtained by an ultraviolet water purification system in which the energy source, i.e. the ultraviolet lamp, once activated, is at all times maintained in an energized state wherein the intensity or amount of ultraviolet radiation, emitted by the lamp and transmitted to the medium or fluid being acted upon, is varied in accordance to the amou
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