Led lamp and lighting device

A lamp having an envelope that includes a globe and a case, an interior space of the envelope being divided in two by a mount closing an opening of the globe, the lamp containing, in a globe side of the interior space, a semiconductor light-emitting element and, in a case side of the interior space, a circuit unit for causing the semiconductor light-emitting element to emit light, wherein

• the mount is a circular disc having a side face that is at least partially joined to the globe by a first adhesive,
• an opening end of the globe is connected to the case by a second adhesive,
• the semiconductor light-emitting element is thermally connected to the mount and spatially separated from the envelope,
• a surface contact region where a part of the mount and an inner circumferential surface of the globe are joined by the first adhesive is larger than a surface contact region between the mount and the case, and
• the mount and the case are joined to the globe such that, during light emission, at least as much heat from the semiconductor light-emitting element is propagated from the mount to the globe as from the mount to the case.