Abstract: An adjustable reflector socket is provided having a bulb socket, a mounting member and a mounting plate. The mounting member has an exterior sidewall, a first end having an end plate, and a second end adjacent to the bulb socket. The sidewall has at least one groove formed therein, with the groove having a plurality of apertures formed therein. The mounting plate preferably has a planar component with at least one mounting aperture through which a fastener passes to attach the plate to the lighting reflector, and a mounting member aperture configured to permit the mounting member to be inserted therethrough. The plate also has at least one flange member extending generally perpendicularly from the juncture of the plate and the mounting member aperture, with the flange member dimensioned to be slidably adapted in the sidewall groove, and with it having formed therein at least one flange aperture.