Florent Drillon/Plainpicture
MORTEN HALMØ PETERSEN used to live in a windowless basement flat in Copenhagen. If he didn’t get out in the daytime, he would lose track of time and start becoming irritated and depressed. “When you are living in a basement with only artificial light, it becomes very clear that something is lacking,” he says. “It’s an emotional, physical and mental thing all combined.”
You can say that again. Our lifestyles have rapidly changed our relationship with light. Prior to the invention of gas lighting at the turn of the 19th century, the only artificial light we could rely on was…