The Lee Filters Gel Sheet 216 White Diffusion Lighting Filter 21x24 is a strong diffusion used for soft light effects. Manufactured on a tough Polyester base in a range of seven strengths. Lee Filters provide high-quality lighting filters in a vast range of colors that are precisely consistent from batch to batch, long-lasting and reliable. Lee Filters includes bright and powerful colorants accurately coated onto base material, high specification, ensuring a level of reliability and performance which is second to none. Every filter is checked against a scientifically generated set of parameters.