The 299 1.2 Neutral Density Filter from LEE Filters is designed to reduce the output of a light fixture by four stops. When applied, no additional coloration or contrast is created. This filter is constructed from polyester that is heat resistant to 356°F and is delivered as a 48" x 25' roll on a 1" core. Under 3200K tungsten light, the 299 1.2 Neutral Density Filter exhibits a 1.24 density and transmits light at 5.8%. Under 6774K Source C light, the filter exhibits a 1.18 density and transmits light at 6.6%.