condition mean min max 4 h after light 3.9140299999999995 3.60165 4.22641 8 h after light 6.9225 6.58199 7.26301 12 h after light 29.34635 28.6011 30.0916 4 h after dark 41.7316 39.7492 43.2509 8 h after dark 20.625966666666667 19.6084 22.1117 12 h after dark 10.883573333333333 9.81392 12.4755