A memory circuit comprises at least a non-volatile random access memory and a random access memory. In preferred embodiments, the thermal sensors are separated by one or more thermal insulating members and the thermal sensors are positioned near the external surface of the electrode at about the same distance from the end of the electrode, so that temperature measurements can indicate the position of the electrode with respect to the tissue desired to be ablated. The microbiological interception enhanced filter medium is most preferably comprised of fibrillated cellulose fibers, in particular, lyocell fibers. A powertrain is supported by the frame, and is comprised of an engine and a clutch. This enables multiple lighting apparatus in an area to be calibrated to the same standard so that uniform illumination is provided.