Brolly Boxes are an economical choice for diffusing or reflecting the light. The UMSB40D is a Light Diffuser and the UMSB40R ( out of Stock) is a Light Reflector. Both are commonly referred to as the “Brolly Box”. This device conveniently attaches to a light in the same manner as an umbrella, then cinches around the faceplate to contain the light. The resulting light effect closely emulates that of a comparably sized softbox.