Interfit Silver Umbrella 39" INT263. These Interfit Umbrellas are used in all Interfit kits containing Umbrellas, from the basic entry level EX150 home studio kit right up to a pro 1000 watt Stellar kit. As a result a consistent quality is maintained throughout all Interfit umbrellas. Umbrellas soften, broaden, & diminish the light output of any tungsten or flash light source. Umbrellas with a white interior will soften & weaken light more than an umbrella with a silver lining. A white umbrella without a black backing may also be used as a makeshift softbox, although the use of the light will not be as efficient as with a light box. Choosing umbrella size is determined by the size of the subject, & the strength of the light supply being used. Dimensions: 39" (100cm).