condition mean min max 4 h after light 2.17786 2.06395 2.29177 8 h after light 1.974735 1.75967 2.1898 12 h after light 3.13579 2.91757 3.35401 4 h after dark 1.96644 1.59529 2.33759 8 h after dark 2.842025 2.70223 2.98182 12 h after dark 2.7764499999999996 2.36568 3.18722