Published in April 2013 as new standard, NEMA SSL 7A-2013 Phase-Cut Dimming for Solid-State Lighting: Basic Compatibility has been referenced by most recent versions of Zhaga Books 2 and 8. These define socketable downlight LED light engines (LLEs) with integrated control gear. In part, reference is due to SSL 7A being only available specification that covers 2-wire, mains-powered, phase-control dimming interface.
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