An integrally shielded germicidal lamp to selectively direct UV light emitted preferably within an air transporting and/or conditioning system. The system comprises a housing, an emitter electrode configured within the housing, a collector electrode configured within the housing and positioned downstream from the emitter electrode, and a therefrom. The system preferably includes a driver electrode is preferably removable from the housing through a side portion of the housing. Preferably, the driver electrode is insulated with a dielectric material and/or a catalyst. Preferably, a removable trailing electrode is configured within the housing and downstream of the collector electrode. Preferably, a first voltage source electrically is coupled to the emitter electrode and the collector electrode, and a second voltage source electrically is coupled to the trailing electrode. The second voltage source is independently and selectively controllable of the first voltage source.