Lamp and Luminaire

A luminaire comprising:

• a luminaire main body including a contact section;
• a socket attached to the luminaire main body;
• and
• a lamp attached to the socket, wherein
• the lamp includes:
• a lamp main body including, a case including an opening at one end and a hole in an other end center, and a cap member integrally including a projection insertable into the hole of the case, attached to the case, and set in contact with the contact section;
• a lighting device including a circuit board and housed in the case;
• a light-emitting module including a substrate superior to the circuit board in heat conductivity and a light-emitting element mounted on the substrate and caused to emit light by the lighting device, the light-emitting module being arranged on the projection to be capable of transmitting heat to the projection;
• and
• a reflecting member including a reflecting cylinder section including a small-diameter opening and a large-diameter opening, a diameter of the reflecting cylinder section gradually expanding from the small-diameter opening to the large-diameter opening, the reflecting member being housed in the case and reflecting light emitted from the light-emitting module to an outside of the lamp main body.