A gas discharge lamp including a power supply connectable to a load, and an overvoltage-protection-and-ground-fault-interrupt circuit interconnected with the power supply. This optical fiber is accommodated without disturbing plasma processing by providing in one of the wafer lift pins an axial void through which the optical fiber passes. Some embodiments describe a method for providing diagonal shielding for a routed net of an IC layout. The analog plant can then be driven with finer resolution than that provided by the limited number of input bit nodes of the DAC. The secured content license includes a master key and a list of the plurality of corresponding content rule sets that have been received in order of reception.