Abstract: A light source apparatus includes a light source, a first housing configured to store the light source, a planar surface of the first housing including a plurality of openings communicating with an outside of the first housing, and a plurality of portions, disposed on the planar surface, each having an inclined plane inclining with respect to the planar surface. At least one of the plurality of portions reflects light from the light source, causing the reflected light to exit the first housing through at least one of the plurality of openings.

Abstract: A lamp having a fin provided in a periphery of a metal base. The fin includes a first surface close to a bright spot of a light-emitting tube and a second surface far from the bright spot on an opposite side of the first surface. A distance between a first inner edge of the first surface and a bright spot plane as a plane orthogonal to a center axis of the metal base including the bright spot is shorter than a distance between the bright spot plane and a first outer edge of the first surface. A distance between the first inner edge and the first outer edge of the first surface is not shorter than a distance between a second inner edge and a second outer edge of the second surface.

Abstract: A lamp having a fin provided in a periphery of a metal base. The fin includes a first surface close to a bright spot of a light-emitting tube and a second surface far from the bright spot on an opposite side of the first surface. A distance between a first inner edge of the first surface and a bright spot plane as a plane orthogonal to a center axis of the metal base including the bright spot is shorter than a distance between the bright spot plane and a first outer edge of the first surface. A distance between the first inner edge and the first outer edge of the first surface is not shorter than a distance between a second inner edge and a second outer edge of the second surface.