
Neil deGrasse Tyson @neiltyson
If half the light of a streetlamp goes up, then a shade could reflect the light downwards, requiring only half the wattage. — PolitiTweet.org
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Mon May 01 03:23:37 +0000 2017
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Likely AvailableNeil deGrasse Tyson @neiltyson
If half the light of a streetlamp goes up, then a shade could reflect the light downwards, requiring only half the wattage. — PolitiTweet.org