A horticulture light system comprising a housing, glass retention rails, gasket, glass sheet, and threaded fasteners. The housing constructed of no more than three portions of sheet metal, defining an interior space therein and having an open end towards the plants, the housing interior space constructed and arranged for containing a grow lamp and reflector to project a pattern of light out the open end of the housing at the plants, the open end including a rectangular sealing face for mating with the gasket, the gasket sealing the glass surface to the rectangular sealing face when compressed by the glass retention rails. The glass retention rails also constructed from sheet metal, easily formed into a L shape, attached by common threaded screws, and as tightened, compressively secure the glass to the gasket and housing. Loosening the threaded screws removes the compressive force, unsealing the glass from the housing, making for easy glass removal, facilitating maintenance and cleaning.