Dedolight - Includes: DSCFS400 - Full Scrim, Single - Light reduction of 25 Percent (Approx. 1/2 stop). DSCFD400 - Full Scrim, Double - Light reduction 50 Percent (Approx. 1 stop). DSCS1/2-400 - Half Scrim, Single - Covers only 1/2 of light exit. Reduces light for half angle of beam. 360 Degree rotatable. DSCD1/2-400 - Half Scrim, Double - Covers only 1/2 of the light exit.