High-power DALI

A digital addressable lighting interface (DALI) controlled device is arranged to communicate information according to a DALI protocol and powered by electrically coupling the controlled device to a DALI bus. The DALI bus is monitored for initiation of a DALI communication sequence. During a period of non-communication on the DALI bus, a high-current power supply is electrically coupled to the controlled device via the DALI bus. The high-current power supply provides a first high-current power signal to the controlled device. Upon detection of any DALI communication sequence on the DALI bus, the high-current power supply is electrically de-coupled from the controlled device for a determined time period. During the determined time period, a storage element is electrically coupled to the controlled device. The storage element provides a second high-current power signal to the controlled device.