Light at Night
“In the 1300s, one million units of lighting โ a lumen-hour โ would have cost around ยฃ40,800 in 2000 prices. By 2006, this had fallen to ยฃ2.90. 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].