Abstract: A low voltage power supply includes a plurality of output terminal pairs interconnected by electrical circuitry effective to permit individual adjustment of the voltages applied between each such pair for powering simultaneously a plurality of light sources at individually selected voltages. The light sources are associated with dental handpieces through umbilical tubings, an exemplary one of which includes a bundle of flexible, light-conducting fibers connected between a first coupling fixture holding a subminiature bulb and a second coupling structurally adapted for connection to a dental handpiece.

Abstract: A low voltage power supply includes a plurality of output terminal pairs interconnected by electrical circuitry effective to permit individual adjustment of the voltages applied between each such pair for powering simultaneously a plurality of light sources at individually selected voltages. The light sources are associated with dental handpieces through umbilical tubings, an exemplary one of which includes a bundle of flexible, light-conducting fibers connected between a first coupling fixture holding a subminiature bulb and a second coupling structurally adapted for connection to a dental handpiece.