3200K Color Temperature to 5700K -137 Mired Shift Can Cool a Scene 0.46 Density for 3200K Tungsten 35% Light Transmission for 3200K 0.47 Density for 6774K Source C 34% Light Transmission for 6774K Heat Resistant to 356°F Polyester Construction The 201 Full Color Temperature Blue Filter from LEE Filters is uniform in color and with a mired shift value of -137, can be applied over a light fixture to purposely create a cool cast over a scene.