condition mean min max 0 h after light 9.084705 8.82666 9.34275 2 h after light 11.285685 8.69977 13.8716 4 h after light 9.74105 6.8981 12.584 8 h after light 9.3194 9.02323 9.61557 12 h after light 11.774085 8.75027 14.7979 2 h after dark 8.77316 8.47637 9.06995 4 h after dark 9.345875 9.04846 9.64329 8 h after dark 8.81746 8.44394 9.19098 12 h after dark 8.7352 7.6672 9.8032