This Litepanels Gel Pack for 1x1 Bi-Color Fixture contains 6 gels for use with Bi-Color fixtures which have variable color temperature of 3200 - 5600K. The included 1/2 and 1/4 CTO filters are used to extend the amber range below 3200K while the 1/2 and 1/4 CTB extend the 1x1's blue output above 5600K. The 1/2 White Diffusion creates a slightly soft rendition of light quality while the Opal Frost has definite soft light characteristics.