Patent ID: 8013537

Claim:
A power adaptor for a lighting unit, comprising: an input for coupling to an electrical power supply; and a controller adapted to monitor an amount of power available at the input and operable to provide at least two independent electrical outputs, each output having a power level that is a function of (i) the power presently available at the input and (ii) a lighting profile, said lighting profile comprising a transfer characteristic defining a relationship between the power available at the input and the independent electrical outputs; wherein the controller is programmed to operate in response to movement of a dimmer control switch, the controller having at least two modes of operation, a first mode being in response to a conventional dimmer switch operation to gradually change a lighting intensity signal at least one of said two independent electrical outputs and wherein the controller is programmed in a second mode to select sequentially a successive one of a plurality of lighting profiles in response to movement of the dimmer control switch back and forth within a predetermined time interval.