From what I understand there is no US federal mandate that restricts power usage of TV displays, only if the manufacturers wants their producst to qualify as Energy Star rated for that year's qualification parameters.
Thus far there is no indication that the possible luminance issues are necessarily due to energy efficiency requirements and could be something else entirely.
Nothing wrong with being 'eco-friendly' and it is short sighted to blithely disregard pursuing those goals, so long as those goals are within reason; unless of course one enjoys wasting money and resources. -Absolutely loathe getting more mileage per dollar or more movie watching for less on each month's power bill, jeesh.
Looking forward to the big VE shootout that should provide definitive answers and hopefully there is a clear winner that will be a decent replacement for my current display.
Politics is like a corral, no matter where you are you'll always be shoveling it.