Radiating device for a lighting device having first and second radiating modules

A lighting device comprising:

• a housing;
• an optical member emitting light to outside;
• a radiating device within the housing;
• and
• a light source module;
• wherein the radiating device has a first radiating module configured to receive heat generated from the light source module;
• and
• a second radiating module that comprises a first member extending to the first radiating module and transmitting the received heat, a second member configured to emit the heat transmitted from the first member to a light emitting space, and a laminated portion in which the first member and the second member are laminated,
• wherein the laminated portion is configured such that the-first second member is laminated on an inner surface of the member;
• wherein the first radiating module and the first member each comprises thermal conductive metal, wherein the second member comprises thermal conductive material having a radiative emission rate higher than that of the first member and having an anisotropy of thermal conductivity,
• wherein the second member has two end parts contacting an inner surface of the optical member, wherein the inner surface faces the radiating device, and the end parts contact an inner surface of the housing,
• wherein the light source module is mounted on the first radiating module to emit light, and
• wherein a surface area of the second member gradually increases from an end adjacent to the first member to an end adjacent to the optical member.