Correction Lighting Gel Filter:Transparent colors: Red,Green,Orange,Blue,Yellow, 7.8 by 7.8in,Each color for 3,total 15 pieces. | Colored Overlays material: Made of high quality light transmission material with light weight steady color temperture and low loss.Avoid attach the gel filters to modeling lamp or it will be melted. | Transparent color filters can be used on color correction and lighting effects.Also can be reading guide for students. | Application:Lighting gels can involve additive and subtractive color, color mixing, color transmission, absorption and filtering of the different wavelengths of light. | Lighting color filters can help kids reduce reading frustration, improve clarity and eye movement control.