Provided is a light-emitting diode fluorescent lamp using as light sources a plurality of LEDs, which are eco-friendly and can contribute to power conservation. In accordance with a particular embodiment of the present invention, the optical disc includes a central clamping area that defines a central aperture operable to be engaged by a spindle mechanism of an optical disc drive, an optically-readable data storage area substantially surrounding the central clamping area, the optically-readable data storage area having a planar thickness of less than 1. The switch includes a switching transistor of the first conductivity type and a switching transistor of a second conductivity type in which one main electrode of the switching transistor of the first conductivity type and one main electrode of the switching transistor of the second conductivity type are connected serially. by adhesive 201, and also being adapted to receive power wirelessly from a transmitter of power when the element and transmitter are in proximity with one another.