condition mean min max 4 h after light 9.386352 9.372434 9.40027 8 h after light 9.043633 8.573861 9.513405 12 h after light 9.017620999999998 8.684387 9.350855 4 h after dark 10.240921499999999 9.727545 10.754298 8 h after dark 9.454543000000001 9.060161 9.848925 12 h after dark 10.434195 10.434195 10.434195