Horticultural light fixture with adjustable air circulation vent hole cover and adjustable light socket assembly

A light fixture, comprising:

• a fixture housing including an interior and an exterior, a top side, first and second angled sides, first and second vertical sides, and first and second open ends;
• first and second end panels disposed in said first and second open ends, respectively, each of said first and second end panels having a specular interior side, wherein at least one of said first and second end panels includes a duct opening;
• at least one duct connector disposed in said at least one duct opening, said at least one duct connector having an interior side;
• a specular insert inserted into the interior of said fixture housing and having sides with interior and exterior surfaces, said interior surfaces being highly reflective, and wherein when said light fixture is assembled, a plurality of said sides of said specular insert are spaced apart from said fixture housing interior so as to provide a cooling and insulating airspace between said specular insert and said fixture housing;
• a base on which each at least one of said fixture housing and said specular insert are mounted;
• a light socket assembly affixed to said interior side of said at least one duct connector, said light socket assembly including a light socket and a bracket for securing and supporting said light socket;
• a lens covering the opening in said base;
• and
• at least one adjustable vent hole cover mounted in said at least one duct connector and in the duct opening in said end panel, said at least one vent hole cover having a fully open position and a fully closed position, such that when said duct connector is connected to an air circulation system, the rate and volume of air flow to and within said interior of said light fixture can adjusted by adjusting the position of said at least one vent hole cover.