A controller (100) for controlling a group (110) of lighting devices (112, 114) is disclosed. The group (110) comprises a first lighting device (112) and a second lighting device (114). The controller (100) comprises a communication unit (102) for communicating with the first and second lighting devices (112, 114), and for receiving a first current light setting of the first lighting device (112) and a second current light setting of the second lighting device (114). The controller (100) further comprises a display (108) and a processor (106) for rendering, on the display (108), a hierarchical representation of the first and second lighting devices (112, 114), and a user interface (104) for receiving user input indicative of an adjustment of the first current light setting, the second current light setting or a current group light setting, wherein the hierarchical representation comprises: a primary level comprising a first primary graphical representation and a second primary graphical representation, wherein the first primary graphical representation is associated with the first lighting device (112) and representative of the first current light setting, and wherein the second primary graphical representation is associated with the second lighting device (112) and representative of the second current light setting, and a secondary level comprising a secondary graphical representation, which secondary graphical representation is associated with the group (110) of lighting devices (112, 114) and representative of the current group light setting of the group (110) of lighting devices (112, 114), and wherein the processor (106) is further arranged for controlling, via the communication unit (102), one or more of the first and second lighting devices (112, 114) according to the user input, and for updating the primary and secondary graphical representations according to the adjustment
