e/Carbon button lamp

Information
has gloss	eng: The carbon button lamp is a single-electrode incandescent lamp invented by Nikola Tesla as one of a few improved lighting sources with regards to Thomas Edison's Incandescent light bulb. A carbon button lamp contains a small carbon sphere positioned in the center of an evacuated glass bulb. This type of lamp must be driven by high-frequency alternating current, and depends on an electric arc or perhaps a vacuum arc to produce high current around the carbon electrode. The carbon electrode is then heated to incandescence by collisions by ions which constitute the electric current. Tesla found that these lamps could be used as powerful sources of ionizing radiation.
lexicalization	eng: carbon button lamp
instance of	(noun) a piece of furniture holding one or more electric light bulbs lamp