A bit of a strech........Don't you think?
No. The government does not have the authority to tell companies or people how efficient their automobile or light bulb must be.
Economics should dictate the light bulb market, not some silly notion about global warming and evil coal, or someone's belief that energy efficiency should be x%. If x% is good, then why not (x+y)% efficient? Higher efficiency is better, right?
It's like the minimum wage argument, there isn't any basis for saying any wage should be minimum. No matter how high they raise the minimum wage, there is always the same argument that can say a higher wage should be the minimum wage. In similar fashion, the government really doesn't have any authority to tell anyone what they should pay someone else.