Umbrellas soften, broaden, and diminish the light output of any tungsten or flash light source. A white translucent umbrella without a black backing such as this, may also be used as a makeshift softbox, although the use of the light will not be as efficient as with a lightbox.
This size is perfect for a 1-2 person head, or head-to-waist shot, or a 4x6 ft product setup.