Nine!

Light is life. I'm grateful for it. And I still sleep way below average.

"It was on this day in 1879 that the inventor Thomas Edison finally struck upon the idea for a workable electric light…
One of the effects of the invention of the electric light is that people sleep less than they once did. Before 1910, people slept an average of nine hours a night; since then, it's about seven and a half. Sleep researchers have shown in the laboratory that if people are deprived of electric light, they will go back to the nine-hour-a-night schedule."

https://open.substack.com/pub/thewritersalmanac/p/the-writers-almanac-from-saturday-da8?r=35ogp&utm_medium=ios&utm_campaign=post