Lastolite 100cm all in one silverwhite umbrella can be used in a studio environment as a silver 02f light loss 5600degkor white 01f stop light loss and 5600degkbounce a white bounce with a silver backing 02f stop light loss 5600degk or as a shoot through 06f stop light loss 5450degk please note this will not fit elinchrom or prolinca heads due to the thickness of the umbrella shaft