SOLAR PANEL DEVICE

A solar panel device is provided, which can be simply attached to an existing fluorescent lamp or LED lamp to construct a power-generating lamp. A solar panel device includes a solar panel (11) that has cross section of an arc band shape with an arc length in a range which is equal to or greater than 1/5 of an outer circumference of a lamp tube (14) cross section and equal to or less than 1/2 of the outer circumference in a width direction and that receives light from a rear surface of the lamp tube and generates an electromotive force, a power supply line (12) that outputs the electromotive force of the solar panel, and a tubular base (13) that has a tube shape, that has the solar panel attached to an inner surface or an outer surface thereof in a length direction, that is externally fitted to the lamp tube covering the lamp tube, and that holds the solar panel so that the light-receiving surface of the solar panel comes into contact with the surface of the lamp tube or is located with a gap of 10 mm or less from the surface of the lamp tube.