FIELD: lighting.
SUBSTANCE: invention relates to lighting engineering. Lighting device (2) is made with possibility of light quality data inclusion in the light emitted by the lighting device. The light quality data relate to state of the lighting device (2), for example to end of its k service life. Light can be detected by the control device (3) being external for the lighting device (2). The control device (3) can further help in determination of the lighting device (2) state, as result the current maintenance operations for the lighting device (2) can be made. So, the servicing personnel can replace the lighting devices and/or light sources requiring maintenance according to state indication of each lighting device before any lighting device of the system will achieve its service life.
EFFECT: increased quality of the emitted light due to more accurate determination of the light source state.
8 cl, 5 dwg
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