Provided is a decontamination apparatus for decontaminating an enclosed room. The decontamination apparatus includes a source including a UVC bulb and a reflective shield arranged adjacent to the UVC bulb and configured to reflect UVC light emitted by the UVC bulb toward a region of the enclosed room to be decontaminated. A mounting system that is adjustable secures the source at a desired location within the enclosed room. A controller is operatively-connected to the source to terminate operation of the UVC bulb in response to a determination that an occupant is present within the enclosed room.