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<Strong>Light at Night</strong>
"_In the 1300s, one million units of lighting — a lumen-hour — would have cost around £40,800 in 2000 prices. By 2006, this had fallen to £2.90. That is a 14,000-fold decline._"
Max Roser and Hannah Ritchie (2023) - "Light at Night". Published online at OurWorldInData.org. Retrieved from: 'https://ourworldindata.org/light-at-night' [Online Resource].
