Patent ID: 7618159

Claim:
A luminaire with a vented iris controller comprising a) a housing comprising a receptacle end for receiving a cable, an aperture end for emitting light, and an iris disposed within the housing and between the receptacle end and the aperture end, b) an iris controller operatively attached to the housing between the receptacle end and the aperture end for selectively dilating and constricting the iris, said iris controller including a hollow cylinder, rotatable relative to the housing about an axis of rotation, said cylinder having a top end, a bottom end, an inner ring entirely disposed internal to the housing, and an outer grippable ring, at least a portion of which is disposed external to the housing, wherein i the inner ring and outer ring of said controller are connected by a plurality of braces in which a vented space is present between each of said braces, ii each vented space traversing the length of the cylinder such that the vented spaces open at both the top end and the bottom end, said vented spaces being disposed external to the housing within said outer grippable ring wherein venting of heat built up within said housing to atmosphere occurs through said vented spaces without proximate structure at either end thereof preventing same.