President TrumpDonald John TrumpTrump suggests Sotomayor, Ginsburg should have to recuse themselves on 'Trump related' cases Sanders says idea he can't work with Republicans is 'total nonsense' Sanders releases list of how to pay for his proposals 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 SandersSanders says idea he can't work with Republicans is 'total nonsense' Sanders defends Castro comments in wake of backlash from some Democrats Sanders releases list of how to pay for his proposals 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.