Lighting device for illuminating a target space, the lighting device having at least one lighting module (1; 18; 19), which has a front side (14; 148; 149) facing the target space and a rear side (15; 158; 159) facing away from the target space, and comprising a front lighting means (11; 118; 119) arranged to emit light from the front side (14; 148; 149), a rear lighting means (12; 128; 129) arranged to emit light from the rear side (15; 158; 159), and a control unit, wherein the control unit of the at least one lighting module (1; 18; 19) is arranged to adjust the front lighting means (11; 118; 119) and the rear lighting means (12; 128; 129), wherein the control unit of the at least one lighting module (1; 18; 19) comprises an interface, via which the lighting device can be connected to a calibration apparatus arranged in the target space, wherein the control unit of the at least one lighting module (1; 18; 19) is arranged to receive a calibration signal from the calibration apparatus via the interface, to calibrate the at least one lighting module (1; 18; 19) to a pre-adjustable light level by evaluating the calibration signal, to dynamically adjust the front lighting means (11; 118; 119) to display information and to adaptively adjust the rear lighting means (12; 128; 129) to the dynamically adjusted front lighting means (11; 118; 119) so that the calibrated light level is constant, wherein the control unit of the at least one lighting module (1; 18; 19) further is configured, if the front lighting means (11; 118; 119) is changed, to change the rear lighting means (12; 128; 129) inversely proportionally to the change in the front lighting means (11; 118; 119), wherein the lighting device comprises a plurality of identical lighting modules (1; 18; 19), and wherein the plurality of lighting modules (1; 18; 19) are connected to one another to form a network in which each of the lighting modules (1; 18; 19) forms a node. has a front side (14; 148; 149) facing the target space and a rear side (15; 158; 159) facing away from the target space, and comprising a front lighting means (11; 118; 119) arranged to emit light from the front side (14; 148; 149), a rear lighting means (12; 128; 129) arranged to emit light from the rear side (15; 158; 159), and a control unit, wherein the control unit of the at least one lighting module (1; 18; 19) is arranged to adjust the front lighting means (11; 118; 119) and the rear lighting means (12; 128; 129), wherein the control unit of the at least one lighting module (1; 18; 19) comprises an interface, via which the lighting device can be connected to a calibration apparatus arranged in the target space, wherein the control unit of the at least one lighting module (1; 18; 19) is arranged to receive a calibration signal from the calibration apparatus via the interface, to calibrate the at least one lighting module (1; 18; 19) to a pre-adjustable light level by evaluating the calibration signal, to dynamically adjust the front lighting means (11; 118; 119) to display information and to adaptively adjust the rear lighting means (12; 128; 129) to the dynamically adjusted front lighting means (11; 118; 119) so that the calibrated light level is constant, to receive a calibration signal from the calibration apparatus via the interface, to calibrate the at least one lighting module (1; 18; 19) to a pre-adjustable light level by evaluating the calibration signal, to dynamically adjust the front lighting means (11; 118; 119) to display information and to adaptively adjust the rear lighting means (12; 128; 129) to the dynamically adjusted front lighting means (11; 118; 119) so that the calibrated light level is constant, wherein the control unit of the at least one lighting module (1; 18; 19) further is configured, if the front lighting means (11; 118; 119) is changed, to change the rear lighting means (12; 128; 129) inversely proportionally to the change in the front lighting means (11; 118; 119), wherein the lighting device comprises a plurality of identical lighting modules (1; 18; 19), and wherein the plurality of lighting modules (1; 18; 19) are connected to one another to form a network in which each of the lighting modules (1; 18; 19) forms a node.