Lighting apparatus includes an effect wheel which is mounted on a rotation
mechanism. The rotation mechanism is mounted on a mechanism which moves the effect
wheel from a position outside of the light path to a position in which the effect
wheel intersects the light path to provide a continuous wheel effect. The translation
mechanism can move the effect wheel between positions in which the effect wheel
crosses the light path in a horizontal direction and in a vertical direction, respectively.
The apparatus allows a continuous wheel effect to be added to a multi-purpose luminaire
and also allows the direction of travel of the continuous wheel effect across the
illuminated field to be continuously varied.