The concept of white light in stage lighting

摘要

In perceiving objects, generally we see them in a white light situation. But, actually, there is not an absolute white, in such a manner that the different light sources have a determined kind of white, what it is known as colour temperature. Even the white light may be of different kinds (different colour temperature), the individual mind tends to perceive it as the same kind of white, that is to say, there is in our mind a psychological function by which we operate an integration in the perception in order to do the object perceptually invariable. On the other hand, it is a common practice in stage lighting to use colour light sources. It is a well known phenomenon that a colour of light produces a change in the object colour perception. However, when we go to theatre, we seen the objects as having their real colour, even if the lighting is not white. In this paper the concept of white light in stage lighting is presented, showing its possibilities of aesthetical expression.