Abstract: A ceiling/overhead mounted delivery system includes a track configured to be mounted to a ceiling or overhead structure and extend in at least one of a first direction and a second orthogonal direction. A positioning tractor is attached to the track for motorized movement thereon. The delivery system may further include a delivery device, such as a selectively actuable germicidal light emitter. A third direction deployment module is coupled to the positioning tractor and the germicidal light emitter and is selectively adjustable to change a distance between the positioning tractor and the germicidal light emitter in a third direction. The third direction is substantially orthogonal to the first and second directions. A controller is configured to move the positioning tractor along the track, selectively operate the third direction deployment module to adjust the distance between the positioning tractor and the germicidal light emitter, and selectively actuate the germicidal light emitter.