I've heard four to six hours a day, but I cannot cite sources. This Google query returns some promising results but you'll have to dig deeper than this for scie

I've heard four to six hours a day, but I cannot cite sources. This Google query returns some promising results but you'll have to dig deeper than this for scientific studies: https://www.google.com/search?q=six+hours+per+day+creative+work https://www.google.com/search?q=six+hours+per+day+creative+w...