Patent ID: 8525412

Claim:
A plasma lamp apparatus comprising: a housing having a spatial volume defined within the housing, the spatial volume having an inner region and an outer region; a support region coupled to the inner region of the spatial volume; a support body having an outer surface region disposed within or partially disposed within the support region, the support body having a support length, a support first end, and a support second end, the second end being coupled to one or more portions of the housing; a gas-filled vessel coupled to the support first end of the support body, the gas filled vessel having a transparent or translucent body, an inner surface and an outer surface, a cavity formed within the inner surface; an RF (radio frequency) source operably coupled to the gas-filled vessel; a tuning device configured within the inner region of the housing, the tuning device having an upper portion and a lower portion, the tuning device being a first electrode element of a capacitor; a second electrode element spatially disposed along a length of the first electrode element, the second capacitor electrode element protruding from a portion of the housing; a capacitor dielectric material configured between the first electrode element and the second electrode element; and an adjustment device coupled to the lower portion of the of the tuning device and configured to cause movement of the first electrode element to the second electrode element to increase a size of the capacitor and capacitance value from a first capacitance value to a second capacitance value based on a predetermined distance to capacitance ratio.