condition mean min max 4 h after light 4.87652 4.76004 4.993 8 h after light 6.444775 5.94904 6.94051 12 h after light 12.230550000000001 12.0609 12.4002 4 h after dark 18.78735 16.4064 21.1683 8 h after dark 11.838000000000001 11.6052 12.0708 12 h after dark 6.964700000000001 6.57711 7.35229