The control system 501 further comprises a control unit 507 for controlling the light output of the luminaire 503, shown by a dashed line, on basis of the detected light, and {HEAD ~ a reference generation unit} 509, which is connected to {TAIL ~ the control unit} 507 
is connected to
The control system 501 further comprises a control unit 507 for controlling the light output of the luminaire 503 , shown by a dashed line , on basis of the detected light , and { HEAD ~ a reference generation unit } 509 , which is connected to { TAIL ~ the control unit } 507
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