Patent ID: 6988807

Claim:
A stage lighting apparatus comprising: an image projection lighting device for operation in theatrical fog comprising: a base housing; a yoke; a lamp housing; wherein the lamp housing is positionable in relation to the yoke by a motor; wherein the yoke is positionable in relation to the base by a motor; a processing system; and a communications port; the lamp housing comprising: a video projector, a filter system which has a first inlet and wherein the filter system is comprised of a first cooling fan, a first air filter and a second air filter, the video projector comprising: a video projector housing with a second air inlet a second cooling fan, a light valve, and a lamp, wherein cooling air external to the lamp housing enters the lamp housing through the first air inlet to pass through the first air filter to form a first filtered air; wherein the first filtered air is passed through the second air filter to form a second filtered air; wherein the first air filter filters theatrical fog particles greater than ten microns; wherein the second air filter filters theatrical fog particles greater than one micron; and wherein at least a portion of the second filtered air is passed through the second air inlet to provide cooling air for the video projector.