condition mean min max 4 h after light 0.882315 0.262741 1.9848 8 h after light 1.0251913333333333 0.250284 1.76047 12 h after light 0.792457 0.515145 1.14309 4 h after dark 1.6931466666666668 1.43272 1.95707 8 h after dark 1.251587 0.668361 1.58017 12 h after dark 0.834451 0.692869 0.928255