DALI/DSI daylight/presence control device for the simultaneous control of two groups of lights depending on the amount of daylight in the room. A sensor detects the outside brightness and uses control characteristics to determine the correct dimming level of the groups of lights. Up to 25 DALI or DSI compatible lamp control devices per output channel, dimming range 1 to 100%, connections are made via plug-in terminals, housing made of polycarbonate (PC), flame-retardant, halogen-free, suitable for luminaire installation or ceiling installation, dimensions: 281 x 50 x 21 mm, weight: 0.14 kg