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A variable-effect lighting system includes a lamp assembly and a lamp controller coupled to the lamp assembly. The lamp assembly comprises a number of multi-coloured lamps in series with an AC voltage source and in series with each other. Each multi-coloured lamp comprises a first illuminating element for producing a first colour of light, and a second illuminating element for producing a second colour of light. The lamp controller is configured to vary the colour produced by the lamps by varying the conduction interval of each illuminating element according to a predetermined pattern. The controller is also configured to terminate the variation upon activation of a user-operable input to the controller.

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This patent has been successfully litigated many times in the US. Other countries are available ie.
China 101292575
Hong Kong 1120701
European 1929843
France 1929843
Germany 1929843
Great Britain 1929843

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