condition mean min max 4 h after light 2.4741400000000002 2.42187 2.52641 8 h after light 2.264255 2.12785 2.40066 12 h after light 2.43729 2.36055 2.51403 4 h after dark 3.4791350000000003 3.1684 3.78987 8 h after dark 3.372325 3.31122 3.43343 12 h after dark 3.07477 2.79979 3.34975