Just the right compliment of gels for your Arri 650 Fresnel or Arri 300 Fresnel for most lighting situations. Rosco E-Color Color Correction Gel Filter Pack with 6 Sheets. Colored gels for lights used in film, video, photo, stage, theater, party, and dj lighting. E-Color is Roscos comprehensive system of European color filters for film and video production. E-Colour includes different filters and materials for color correction, color effects, diffusion and reflection. Theyre manufactured with the latest dye formulations and bonding technology to assure the highest levels of reliability and performance.The most widely specified theatrical filter in the world. Rosco gels, also known as lighting filters, are thin sheets of plastic (polycarbonate or polyester) designed to be placed in front of a light source to produce a wide range of colors for setting mood or creating interest.