President TrumpDonald John TrumpTrump's top adviser on Asia to serve as deputy national security adviser United Auto Workers strike against GM poised to head into eighth day Trump doubles down on call to investigate Biden after whistleblower complaint: 'That's the real story' MORE quipped at a Monday evening rally that his administration’s rollback of energy efficiency standards for lightbulbs was due to the fact that he looked better under less efficient bulbs.

"I'm not a vain person. ... But I look better under an incandescent light than these crazy lights that are beaming down," Trump told a crowd in Fayetteville, N.C., on Monday.

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The administration finalized the reversal of Obama-era efficiency standards last week, rolling back the rules for about half of lightbulbs. Critics of the move say it will hasten climate change by requiring the U.S. to produce more energy to power the less efficient bulbs.

Sen. Bernie SandersBernie SandersOmar: Biden not the candidate to 'tackle a lot of the systematic challenges that we have' Seven takeaways from a busy Democratic presidential campaign weekend in Iowa Democrats go all out to court young voters for 2020 MORE (I-Vt.), whose home state is one of several that have passed state laws to keep the Obama-era standards in place, pledged to restore them at the federal level as president last week at a climate change town hall hosted by CNN.

“If you can get electricity from a lightbulb that utilizes one-tenth of the power that an old incandescent lightbulb uses, of course you're going to do that. Of course, you're going to encourage that technology,” Sanders said.