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This standard provides compatibility requirements when a forward phase cut dimmer is combined with one or more dimmable LED Light Engines (LLEs). An LLE comprises one or more LED modules, LED control gear (integral or remote), and a connection to the mains circuit. This includes both screw-in integrated LED lamps, as well as fixtures which contain separate LED drivers. NEMA SSL 7A-2013 is meant to reduce the testing burden by utilizing synthetic loads and waveform generators to represent LLEs and dimmers during testing.