condition mean min max 4 h after light 1.6949133333333333 1.32901 2.40694 8 h after light 1.529153 0.340199 2.53425 12 h after light 2.4017633333333333 1.62215 3.52991 4 h after dark 2.038304 0.918262 3.12561 8 h after dark 1.89146 1.51041 2.6012 12 h after dark 2.15091 1.91447 2.38966