condition mean min max 0 h after light 0.499417 0.498972 0.499862 4 h after light 0.7571365 0.327973 1.1863 8 h after light 1.6693 1.64552 1.69308 4 h after dark 2.4535 1.63997 3.26703 8 h after dark 1.3139175 0.825945 1.80189 12 h after dark 0.6535485 0.332201 0.974896