The GODOX KNOWLED GR15 15-Degree G-Mount Photo Studio Reflector is designed for use with the GODOX MG1200Bi and MG2400BiLED Cine Light. Thanks to its narrow beam angle of 15°, it throws light over long distances, ideal for illuminating a small area of a large set. Unlike using a Standard Spill-Kill reflector with a 15° honeycomb grid, (which absorbs some of the light), this long-focus reflector uses a combination of its long, narrow parabolic shape, and its Highly Reflective faceted silver interior to focus the light, increasing its effective light output and reach. The KNOWLED GR15 Photo Studio Reflector is great for large film, television, and theatrical productions.