Luminaire for cognitive symptoms or light irradiation apparatus for improving depression-like symptoms, the room equipped with the light irradiation device, and cognitive symptoms and improving depression-like symptoms

Light irradiation device 20 for cognitive symptoms and improving depression-like symptoms of the present invention provides a light stimulus to a retina by continuous flashing of the light source 21 by the frequency of 1 to 10 Hz, continuously expressing the Homer1a by light stimulation, cerebral the BK-type potassium channel in the pyramidal cells of the cortex and characterized by activating, depression-like symptoms improvement equivalent effect by electric convulsive stimulation device, and transcranial magnetic stimulation devices depression-like symptoms improvement and cognitive symptoms improved by it is possible to exhibit the effect the same effect, as compared to electric convulsion stimulator and transcranial magnetic stimulation devices are limited to the treatment of medical institutions, it can also be used in residential.