condition mean min max 4 h after light 1.64835 1.56093 1.73577 8 h after light 1.1287815 0.992893 1.26467 12 h after light 1.0532195 0.905429 1.20101 4 h after dark 1.8165200000000001 1.77095 1.86209 8 h after dark 2.275625 2.16956 2.38169 12 h after dark 2.28682 2.18507 2.38857