We designed the Universal 1×1 Lightbank #1655 to fit a wide array of square 1×1 style LED panels. At minimum, a light that is at least 12×12″ and 0.75″ thick will fit. At maximum that is 14.75×14.75″ by 2.” The corner elastic as well as two loops to hook around side yoke knobs, help secure the lightbank to the light for a great tool for many popular LED panels!