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The National Electrical Manufacturers Association (NEMA) has published two new solid state lighting standards: 1) NEMA SSL 1-2010 Electronic Drivers for LED Devices, Arrays, or Systems, and 2) NEMA SSL 6-2010 Solid State Lighting for Incandescent Replacement—Dimming. With these publications, NEMA establishes harmonized requirements and expectations for solid state lighting (SSL). Both are directed toward designers, manufacturers, and users of SSL products.
For SSL 1: http://www.nema.org/stds/ssl1.cfm
For SSL 6: http://www.nema.org/stds/ssl6.cfm