The dedolight Lightstream Flag System is for any situation where one needs to control light spilling beyond the reflector in any studio, large or small, or any situation outside of a studio where the light spills beyond the reflectors and then bounces back from anything which is bright or in light contrast. Working with dedolight Lightstream, often the light will be reflected from one reflector to another, and beyond, enabling the subject to be lit from more than one direction. This can result in spill light coming back at the subject. If the walls in a studio, for example, are dark, or covered by curtains, this may be less of an issue - however, when one needs to control the light and prevent uncontrolled light from hitting the background, then this system provides an effective way to do this.