RoscoSun Daylight Conversion Filters are used when shooting in an interior at a 3200 deg K balance. They are required at windows or other openings to convert incident daylight to an approximation of 3200 deg K. Partial conversions are utilized where less than full correction ( a cooler bluer daylight appearance) is preferred. All roll materials are 100 sq. ft., 58" wide, and are optically clear.