A set of two A4-sized films that diffuse light. This set includes two sheets of white vinyl chloride film with high light diffusion properties. By applying these films to the surface or back of illuminated sign panels, the light from the internal light source is diffused, making it possible to create illuminated signs with a high degree of uniformity, without the appearance of individual lamps. * By combining with 3M Scotchcal Light Diffusion/Diffuser Film, it is possible to maintain uniform brightness to the edges while reducing the number of light sources. * 3635-30 has a light transmittance of approximately 30%, and 3635-70 has a light transmittance of approximately 60%.