Currently, for an LED fixture to be "Lighting Facts" approved, each derivation of the fixture has to be approved ( ie. each mA current rating, color temperature, etc. )
This has been almost prohibitively expensive and will change. Per LEDs Magazine:
"At the Strategies in Light conference, a US Department of Energy representative said that later this year manufacturers can get Lighting Facts Label recognition for all members of a product family, while only fully testing one product"
http://ledsmagazine.com/news/10/2/13
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