Method of self-calibrating a lighting device and a lighting device performing the method

A lighting device comprising:

• a control unit;
• at least one tunable light source arranged to provide one or more light output settings;
• wherein the control unit is arranged to monitor a calibration area, which encompasses at least a part of an area being illuminated by the lighting device, and to calibrate the one or more light output settings of the lighting device (L1);
• wherein the control unit, when monitoring the calibration area, is arranged to repeat:
• detecting a relevant change, if any, out of a set of relevant changes comprising at least a light intensity change, in the calibration area during a monitoring time, while keeping the light output of the lighting device constant;
• determining an amount of change within the monitoring time;
• and
• comparing the amount of change with a limit value;
• until the amount of change is below the limit value.