DALI control unit for cavity/luminaire installation. Control unit for daylight and presence-dependent control of up to 32 DALI operating devices, connection of additional light and presence sensors, predefined function modes for simplified commissioning, individual adaptability of the function parameters via IR remote control, automatic and manual specification of the control setpoint, 100h burn-in function for low-pressure fluorescent lamps, operation via standard button and IR remote control, housing intended for installation in cavities such as suspended ceilings or possibly also in luminaire housings.