| 摘要 |
A power adaptor for a lighting unit, comprising an input for coupling to an electrical power supply and a controller adapted to monitor the input and operable to provide at least two independent electrical outputs, each output having a power level based on an amount of power available at the input. The independent electrical outputs may be used to supply and control an intensity and/or colour characteristic of a solid state lighting unit, comprising at least two separately controllable coloured emitters.
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