Patent ID: 7638945

Claim:
A cold cathode tube lamp that is fed with power from a first conductive member and a second conductive member when mounted with the first conductive member and the second conductive member in a mounted state, the cold cathode tube lamp comprising: an insulating tube formed of an insulating material that passes light; a first internal electrode provided inside the insulating tube; a second internal electrode provided inside the insulating tube; and a first external electrode provided outside the insulating tube and connected to the first internal electrode so as to be provided with a same potential as a potential of the first internal electrode; wherein the first external electrode is arranged to be capacitively coupled to the first conductive member when in the mounted state; and the first external electrode includes a portion provided on an outer circumferential surface of the insulating tube that is located at a different position than where the first external electrode is connected to the first internal electrode.