Patent ID: 8393757

Claim:
A light-bulb type LED lamp comprising: a plurality of LEDs; a base; a lighting circuit configured to convert commercial power provided through the base into power for lighting the LEDs; and a heat radiation member having a bowl-shaped portion, the bowl-shaped portion having a light transmitting opening through which light emitted by the LEDs is transmitted; at least two independent stages, each stage extending inwards inward from a different location along an inner circumferential surface of the bowl-shaped portion, and being tiered in a direction of a central axis of the bowl-shaped portion, and the LEDs being mounted on the stages in a circumferential direction about the central axis, at least one stage being divided into a plurality of sections in the circumferential direction, and the at least one stage being separately fastened to the inner surface of the bowl-shaped portion with a fastening member, the at least one stage being pivotable about the fastening member such that an angle of an LED mounting surface on each section is changeable with respect to the central axis.