condition mean min max 4 h after light 3.2037126666666667 3.1299259999999998 3.2983290000000003 8 h after light 2.347679 1.4888569999999999 2.7947130000000002 12 h after light 1.544376 1.452166 1.6577819999999999 16 h after light 3.172683333333333 2.6719009999999996 3.7335480000000003 4 h after dark 2.811440666666667 2.446787 3.073256 8 h after dark 2.512158 1.612541 4.025017