1. An illumination apparatus, comprising:a light source;
a communication device that performs wireless communication;
a timer that indicates a current time;
a storage that stores scene information indicating a scene specified by at least one of dimming and toning, and an activation time indicating a time at which the scene indicated by the scene information should be activated; and
a controller that, when the current time indicated by the timer reaches the activation time, causes the light source to emit light in a mode for the scene indicated by the scene information, and transmits the scene information and the current time indicated by the timer to an external device via the communication device, wherein
the controller adjusts the current time indicated by the timer to synchronize with a current time of the external device according to an internally elapsed time in the illumination apparatus, when the communication device receives the current time of the external device from the external device, the internally elapsed time being a time duration after receiving the current time of the external device.