Light is the aspect of radiant energy of which a human observer is aware through the visual sensations which arise from the stimulation of the retina of the eye. Light is one of a number of know forms of radiant energy that travel with wave motion.
Film: A ‘correct light’ is the Red, Green and Blue printer settings for correct colour printing of a given negative (1985).
Light emitting Diode (LED): A type of low-level light component used in many frame count and time code systems.
Case, D., 1985, Motion Picture Film Processing, Media Manuals, Focal Press, London, Boston