Generic term used in reference to any colored translucent material (color media) that is used to color a light, whether the material is made from gelatin, glass or plastic.
                                                            
                                                     
                        
                                                
                        
                        
                            Coloured filters put over lights to give a coloured lighting effect. They used to be made out of gelatine.
                                                            
                                                     
                        
                                                
                        
                        
                            Large coloured sheets of a transparent medium which are used over any type of light to add colour. (Also the smaller C.C. & camera filters.) (see CC filters)