Abstract: A method includes: receiving, by a terminal device, position information of the terminal device via a wireless signal, and time information; obtaining solar radiation amount information corresponding to the position information of the terminal device and the time information; obtaining a corrected received-light amount by correcting the amount of light received by the terminal device, based on a radio field reception intensity of the wireless signal that includes the position information, the amount of light received being indicated in the solar radiation amount information; and obtaining, by the terminal device, a cumulative value of amounts of light which the user of the terminal device has been exposed to, using the corrected received-light amount.

Abstract: A treatment luminaire includes: a first light source; a second light source; a hinge for adjusting a crossing angle between the light distribution axis of the first light source and the light distribution axis of the second light source; and a controller which switches, according to the crossing angle, operation modes of the first light source and the second light source between a normal mode for emitting illumination light for illuminating a surrounding area and a treatment mode for emitting treatment light for therapeutic use.

Abstract: A method includes: receiving, by a terminal device, position information of the terminal device via a wireless signal, and time information; obtaining solar radiation amount information corresponding to the position information of the terminal device and the time information; obtaining a corrected received-light amount by correcting the amount of light received by the terminal device, based on a radio field reception intensity of the wireless signal that includes the position information, the amount of light received being indicated in the solar radiation amount information; and obtaining, by the terminal device, a cumulative value of amounts of light which the user of the terminal device has been exposed to, using the corrected received-light amount.

Abstract: A mirror function display apparatus includes an imager that captures an image of a user, a display that displays the captured image of the user captured by the imager, a light source that emits light including treatment light toward a front side of the display, the treatment light producing a treatment effect, and a controller that controls the display, the light source, and the imager. The controller controls the light source and the imager to capture a first captured image of the user when the treatment light is emitted, and a second captured image of the user when the treatment light is not emitted. The controller corrects, in terms of a hue, the first captured image based on the second captured image so as to cause the display to display a corrected first captured image obtained by correcting the first captured image.

Abstract: A received-light amount measurement system is provided. The received-light amount measurement system includes: a first device that is wearable and obtains a first amount of received light; and a controller that, obtains first information on the first amount of received light from the first device. When the first amount of received light is less than or equal to a first specified value, the controller calculates interpolation information for interpolating the first amount of received light during a time period in which the first amount of received light is less than or equal to the first specified value, and determines the interpolation information as an interpolated amount of received light obtained by the first device.

Abstract: A treatment luminaire includes: a first light source; a second light source; a hinge for adjusting a crossing angle between the light distribution axis of the first light source and the light distribution axis of the second light source; and a controller which switches, according to the crossing angle, operation modes of the first light source and the second light source between a normal mode for emitting illumination light for illuminating a surrounding area and a treatment mode for emitting treatment light for therapeutic use.

Abstract: A light treatment apparatus is an example of a light-emitting apparatus including a white light source, a blue light source, and a controller. The controller performs (i) constant light emission control for causing each of the white light source and the blue light source to emit light at constant brightness, and (ii) light reduction control which is performed after the constant light emission control so as to cause each of the white light source and the blue light source to reduce light intensity. The controller causes the blue light source to start reducing light intensity before causing the white light source to start reducing light intensity, and turns on the blue light source at the same time as or before turning on the white light source.

Abstract: A lighting system includes: an illumination light source which irradiates a user with illumination light; a user interface which receives a user operation; a controller which controls an amount of light of the illumination light source and an irradiation period of the illumination light source; and a storage which stores characteristic information having a negative correlation between the amount of light and the irradiation period. When the user interface receives a user operation which specifies a value of one of the amount of light and the irradiation period, the controller determines a value of the other according to the characteristic information and controls the illumination light source according to the specified value of the one of the amount of light and the irradiation period and the determined value of the other.

Abstract: A mirror function display apparatus includes an imager that captures an image of a user, a display that displays the captured image of the user captured by the imager, a light source that emits light including treatment light toward a front side of the display, the treatment light producing a treatment effect, and a controller that controls the display, the light source, and the imager. The controller controls the light source and the imager to capture a first captured image of the user when the treatment light is emitted, and a second captured image of the user when the treatment light is not emitted. The controller corrects, in terms of a hue, the first captured image based on the second captured image so as to cause the display to display a corrected first captured image obtained by correcting the first captured image.

Abstract: A light treatment apparatus is an example of a light-emitting apparatus including a white light source, a blue light source, and a controller. The controller performs (i) constant light emission control for causing each of the white light source and the blue light source to emit light at constant brightness, and (ii) light reduction control which is performed after the constant light emission control so as to cause each of the white light source and the blue light source to reduce light intensity. The controller causes the blue light source to start reducing light intensity before causing the white light source to start reducing light intensity, and turns on the blue light source at the same time as or before turning on the white light source.

Abstract: A lighting system includes: an illumination light source which irradiates a user with illumination light; a user interface which receives a user operation; a controller which controls an amount of light of the illumination light source and an irradiation period of the illumination light source; and a storage which stores characteristic information having a negative correlation between the amount of light and the irradiation period. When the user interface receives a user operation which specifies a value of one of the amount of light and the irradiation period, the controller determines a value of the other according to the characteristic information and controls the illumination light source according to the specified value of the one of the amount of light and the irradiation period and the determined value of the other.

Abstract: A lighting control system includes: a biological information obtainer which obtains biological information related to a biological body of a user; an environmental information obtainer which obtains environmental information related to a surrounding environment of the user; a severity determiner which determines a severity of premenstrual syndrome (PMS) based on the biological information obtained by the biological information obtainer and the environmental information obtained by the environmental information obtainer; and a lighting controller which controls a lighting device based on the severity determined by the severity determiner.