Heat dissipating lighting fixture mount

A heat dissipating lighting fixture adapted to be mounted to a junction box having spaced mounting screws extending into said box comprising, in combination, a housing including a top plate member, a light socket mounted on said plate member, a mounting ring assembly adapted to connect said housing to said junction box, said ring assembly including a horizontally directed annular rim, a mounting bar at the upper edge of said ring assembly, said bar including spaced elongate aperture means for receiving said mounting screws of said junction box to hold said bar to said box, a housing support bracket movably mounted to said ring assembly, said bracket extending diammetrically of said ring assembly in parallel spaced relation to said bar, said bracket including at each of its longitudinal extremities means releasably and rotatively to support said bracket with respect to said ring assembly, whereby said bracket may be rotated relative to said ring assembly but is locked against substantial movement in directions normal to the plane of said rim, heat insulation means disposed in said ring assembly between said bracket and said bar and fastener means on said bracket adapted to be received in complemental fastener means on said top plate of said housing, whereby said bracket is clampingly engaged against said top plate, said assembly providing an elongate heat conducting path from said housing to said junction box, said path extending through said bracket to said rim and from said rim to said bar.