condition mean min max 4 h after light 1.45695 1.31436 1.59954 8 h after light 0.8087035 0.668222 0.949185 12 h after light 0.6909259999999999 0.590472 0.79138 4 h after dark 1.383225 1.27533 1.49112 8 h after dark 1.407315 1.39736 1.41727 12 h after dark 1.76506 1.75984 1.77028