We carry tempered Glass for all of Sunlight Supply's Plant Grow Reflectors. Tempered glass helps protect HPS & MH bulbs from dust and debris which increases the bulb life. Protective glass is required in Metal Halide reflectors for the UL listing to apply. Optional tempered glass is available for the Sunlight Supply's Sun System 2 grow light systems & Super Sun, Reflectors.
However glass is now included with many of the Sun System Reflectors including the Cool Sun, Super Sun 2, Magnum Great White, Blockbuster and Yieldmaster Reflectors. Check the product page for details.