Objectives of Lighting: When applied in a controlled manner light helps to establish visibility, highlight selected areas create the required environment and create three dimension aspect of actors and objects.

(A) Illumination: Theatre being an audio-visual art has, one of the primary objects of stage light i.e. to provide sufficient (adequate) illumination so that the audience may see the actors and be able to feel the environment easily visibility can be achieved through the installation of various kinds (types) of lighting equipment. Generally, the stage is divided into six or nine parts(down right, down left, down centre, centre left, center, centre right, up left, up centre, upright), according to its dimensions, to design the lighting be used on stage. The visibility of an object depends upon three factors. A distance between the stage and audience, for proper visibility. In different theatres, different levels of illumination are required keeping in mind the distance between the stage and the audience. 

(B) Integrity of lights falling upon the stage: The number of lights to be used depends on the size of the stage, while designing the lights. The number of lights needs to be enough to illuminate the whole stage sufficiently, according to size, the number may increase or decrease. 

(C) Its contrast with the background: This can be viewed in the context of the distance between the actor-object with the background which it is placed in contrast to them. If the background color matches or is similar to the color worn by the actors then lights of greater utterly are required, whereas, if the color contrast then the object actor is established comparatively easily. For example if there is blue background as ‘cyclorama’ and the actor is wearing a red costume, then the character can be established easily.