Patent ID: 8882305
Filing Date: 2014-11-11
Classification: F21K,F21V,F21Y

Abstract:
1. A bulb-type lamp comprising: a globe including a constricted part, a straight part, and a spherical part, the constricted part having in a tubular shape with gradually increasing diameters between first and second ends thereof, a diameter at the second end thereof being about 1.5 to 2.5 times a diameter at the first end thereof, an outer surface of the constricted part being curved inward towards a lamp axis extending through central portions of the straight part, the constricted part, and the spherical part, the straight part being continuous with the first end of the constricted part and having a constant diameter along the lamp axis that is equal to the diameter of the first end of the constricted part, and the spherical part being in a spherical shape and continuous with the second end of the constricted part; a light source part that is continuous with the constricted part and including a semiconductor light-emitting element contained in the globe and positioned so that a light-emitting end thereof is between the first and second ends of the constricted part; and a cap disposed at one end of the globe.