condition mean min max 0 h after light 137.3065 130.098 144.515 4 h after light 54.212 51.2351 57.1889 8 h after light 38.34665 37.8004 38.8929 4 h after dark 69.8749 52.1067 87.6431 8 h after dark 68.62525 68.4352 68.8153 12 h after dark 99.38745 84.8999 113.875