Dental light devices having an improved heat sink

A light weight, handheld curing light system comprises a light source housing comprising at least one light source mounted on at least one heat sink for drawing heat away from said at least one light source, said at least one heat sink comprising:

• a thermally conductive housing substantially contained inside the light source housing, said conductive housing comprising an open end, a closed end, and a substantially hollow interior;
• and
• a capping device comprising a formation for fitting in the open end of the thermally conductive housing;
• wherein said substantially hollow interior of said thermally conductive housing is partially filled with at least one phase change material for absorbing heat generated by the light source mounted on the closed end of said conductive housing;
• wherein said curing light system has an average longer run time when compared to a curing light system having a heat sink with a substantially equivalent volume that does not contain a phase change material.

A light weight photocuring or photobleaching light system comprising:

• a light source housing comprising at least one light source mounted on at least one heat sink for drawing heat away from said at least one light source, said at least one heat sink comprising:
• a thermally conductive block substantially contained in the light source housing, said thermally conductive block having a bore, said bore being at least partially filled with at least one phase change material undergoing substantially reversible phase changes, and
• a capping device for capping and open end of said block for containing said phase change material inside said bore;
• wherein said light source is mounted on said block away from said open end
• wherein said photocuring or photobleaching light system has a power supply locatable on said light source housing, said power supply serving to provide electrical power to said light source.