Patent ID: 8604679

Claim:
An LED light source lamp configured to be used by being attached to a lamp holder, the LED light source lamp comprising: a housing configured to be attached to the lamp holder; a drive circuit provided in the housing; an LED installation plate arranged, in a main space in the housing, on an attachment side of the LED light source lamp to the lamp holder; an LED module installed on a surface of the LED installation plate, opposite to the lamp holder, and including at least one LED element that emits light by being driven by the drive circuit; and a light diffusion member arranged to block an optical axis of light emitted by each of the at least one LED of the LED module, the light diffusion member transmitting light, wherein the drive circuit is arranged in an outer peripheral space, between the LED module and the light diffusion member, and does not block the optical axis of light emitted by each of the at least one LED of the LED module, the LED light source lamp further comprising a separation member configured to separate the drive circuit from a space between the LED module and the light diffusion member to shield thermal radiation from the LED module, and configured to reflect and direct a part of light, emitted from the LED module, that is not directly incident onto the light diffusion member, toward the light diffusion member.