Luminaire network, comprising a plurality of luminaires (20, 30, 40) comprising a lighting apparatus (21, 31, 41), wherein a plurality of the luminaires comprise: a communication unit (25, 35, 45) configured to enable communication of data to and from communication units of other luminaires in said plurality of luminaires (20, 30, 40) and/or to a central unit; a processing unit (24, 34, 44); a control unit (23, 33, 43) configured to control the lighting apparatus (21, 31, 41) as well as the communication (25, 35, 45) and processing (24, 34, 44) units; and at least one first sensor (22, 32, 42), configured to output first sensed data (S 1, S 2, S 3), wherein the at least one first sensor comprises a camera for capturing images of vehicles; wherein the processing unit (24, 34, 44) is configured to process the first sensed data to produce first processed data (P 1, P 2, P 3); wherein the luminaire network is further configured such that the first processed data (P 1, P 2, P 3) of at least two luminaires is further processed to produce second processed data, wherein at least one luminaire (20, 30, 40) of the plurality of luminaires (20, 30, 40) comprises at least one secondary sensor configured to output second sensed data (C 1, C 2, C 3), wherein the processing units (24, 34, 44) of the luminaires are further configured to determine an indication of estimated quality (Q 1, Q 2, Q 3) of the first sensed data (S 1, S 2, S 3) and/or the first processed data (P 1, P 2, P 3), wherein the indication of the estimated quality (Q 1, Q 2, Q 3) of the first sensed data (S 1, S 2, S 3) and/or of the first processed data (P 1, P 2, P 3) is taken into account to produce the second processed data, wherein the indication of the estimated quality (Q 1, Q 2, Q 3) of the first sensed data (S 1, S 2, S 3) and/or the first processed data (P 1, P 2, P 3) is based at least in part on the second sensed data (C 1, C 2, C 3), wherein the processing unit (24, 34, 44) is configured such that the first processed data is classification information comprising classes of vehicles, wherein the luminaire network is configured such that the second processed data is classification information comprising classes of vehicles. a communication unit (25, 35, 45) configured to enable communication of data to and from communication units of other luminaires in said plurality of luminaires (20, 30, 40) and/or to a central unit; a processing unit (24, 34, 44); a control unit (23, 33, 43) configured to control the lighting apparatus (21, 31, 41) as well as the communication (25, 35, 45) and processing (24, 34, 44) units; and at least one first sensor (22, 32, 42), configured to output first sensed data (S 1, S 2, S 3), wherein the at least one first sensor comprises a camera for capturing images of vehicles; wherein the processing unit (24, 34, 44) is configured to process the first sensed data to produce first processed data (P 1, P 2, P 3); wherein the luminaire network is further configured such that the first processed data (P 1, P 2, P 3) of at least two luminaires is further processed to produce second processed data, wherein at least one luminaire (20, 30, 40) of the plurality of luminaires (20, 30, 40) comprises at least one secondary sensor configured to output second sensed data (C 1, C 2, C 3), wherein the processing units (24, 34, 44) of the luminaires are further configured to determine an indication of estimated quality (Q 1, Q 2, Q 3) of the first sensed data (S 1, S 2, S 3) and/or the first processed data (P 1, P 2, P 3), wherein the indication of the estimated quality (Q 1, Q 2, Q 3) of the first sensed data (S 1, S 2, S 3) and/or of the first processed data (P 1, P 2, P 3) is taken into account to produce the second processed data, wherein the indication of the estimated quality (Q 1, Q 2, Q 3) of the first sensed data (S 1, S 2, S 3) and/or the first processed data (P 1, P 2, P 3) is based at least in part on the second sensed data (C 1, C 2, C 3), wherein the processing unit (24, 34, 44) is configured such that the first processed data is classification information comprising classes of vehicles, wherein the luminaire network is configured such that the second processed data is classification information comprising classes of vehicles.