> Where? Almost the entire world? The sun is up for less than 9.5 hours in winter unless you are very close to the equator.[1][2][3][4] And that's assuming 0%

> Where? Almost the entire world? The sun is up for less than 9.5 hours in winter unless you are very close to the equator.[1][2][3][4] And that's assuming 0% cloud coverage. In reality, places like Germany only get an hour or two of real sunshine a day in the winter[5]. [1] https://www.timeanddate.com/sun/usa/new-york https://www.timeanddate.com/sun/usa/new-york [2] https://www.timeanddate.com/sun/usa/san-francisco https://www.timeanddate.com/sun/usa/san-francisco [3] https://www.timeanddate.com/sun/spain/madrid https://www.timeanddate.com/sun/spain/madrid [4] https://www.timeanddate.com/sun/china/beijing https://www.timeanddate.com/sun/china/beijing [5] https://www.statista.com/statistics/982758/average-sunshine-hours-germany/ https://www.statista.com/statistics/982758/average-sunshine-...