The disclosure is configured to determine that the object of amount of ambient light exposure and experience about light-sensitive system. Information of the invention wirelessly exchanges difference of the light between the identical user of different wearable devices and/or equipment. Local and/or axis light profile database are to share between assembling system and device, therefore it is typical position light data in the specific time in one day and the situation that can be used for estimating Current ambient light level year, and not measuring can be taken.
