Simply slide this unique product over a mugul base socket on most horizontal burning reflectors to filter & disperse the intense hot spot of light directly under an HID lamp. With the hot spot diffused, you can hang reflectors closer to the plant canopy while reducing the risk of burning the plants directly under the lamp. The revolutionary shape, size and hole patterns were designed using the latest lighting development software. The Equalizer will aid in improving the uniformity of your fixture by reducing the hot spot below the lamp. FIXTURES THAT WILL ACCEPT THE EQUALIZER: MH/HPS: Cool Sun, Cool Sun XL, Econocool, Super Sun 2, Cool Breeze 6, Cool Breeze 8, Econowing & Maximizer HPS ONLY: Large Horizontal, Super Spectrum & Yield Master 6inch. FIXTURES THAT WILL NOT ACCEPT THE EQUALIZER: Super Sun, SunGro, Yield Master 4inch, Yield Master 6inch MH, Econo Gro & Lumenmax.