Patent ID: 8047688
Filing Date: 2011-11-01
Classification: F21K,F21S,F21V,F21Y

Abstract:
1. A bulb-type lamp comprising: a light emitting module on which at least one light emitting element is mounted; a cylindrically-shaped housing having openings at both ends, which are first and second ends; a mount member on a front surface of which the light emitting module is mounted, the mount member closing a corresponding one of the openings of the housing by being in contact with an inner circumferential surface of the first end of the housing; a base attached to the second end of the housing; and a circuit that is disposed inside the housing and, upon receiving power via the base, causes the at least one light emitting element to emit light, wherein the mount member has high thermal conductivity, the second end of the housing has smaller outer and inner diameters than the first end of the housing, the housing is made of a metallic material, a wall thickness of the housing is in a range of 200 μm to 500 μm inclusive, and the wall thickness of at least one portion of the housing decreases from the first end toward the second end of the housing.