Lamp Device, Light-Emitting Device and Luminaire

The invention provides a lamp device, a light-emitting device and a luminaire. According to one embodiment, the lamp device includes a base body, a light-emitting module and a lens unit. The base body includes a recess part. The light-emitting module includes a board mounted with a light-emitting element. The board is arranged in the recess part. The lens unit includes a metal surface member to hold a lens. The surface member is arranged in the recess part and is thermally coupled to the base body and the board. According to the lamp device, the heat generated by the light-emitting element can be transmitted to the surface member, made of metal, of the lens unit with good efficiency from the base body and the substrate, a nd the head can be dissipated from the metal surface member with good efficiency, and thus the heat dissipation performance of the lens unit is expected to be improved.