The present invention is a lighting device for an electronic or electromechanical
apparatus such as a timepiece of the wristwatch type. The invention including a
device displaying time-related or other information, this lighting device including
a light source for lighting the display device. The lighting device is characterized
in that the light source is also able to measure the intensity of the ambient light.
The invention also concerns a method for controlling the lighting of an apparatus
of the aforementioned type.