This Half Double Scrim from ARRI is a modifier that attaches to the 5" accessory mount on your ARRILITE 600, 300 Fresnel, 125W HMI, or other compatible lighting fixture to reduce light output and create specular highlights. The half double design allows this scrim to cover half of the light, thereby creating a horizon line that divides one area of hard, specular light from an area of unmodified light. The scrim can be rotated so that you can position your areas of modified light more precisely. This half double scrim provides twice the light reduction when compared to the ARRI Half Single scrim.