Bright, naturally moving forms flow downwards a vertical projection screen. Sometimes the light is only visible for a fraction of a second and looks like thunderbolts. The abstract visuals are accompanied with an alienated mechanical sound. Although the projected imagery is reduced to a minimum of visual information, one can still recognize video recordings of drops of a fluid running down a surface. Luminous flux questions our perception of forms and surfaces. Besides, it is a visual study of the physicality of light and the way it behaves in space.