condition mean min max 4 h after light 393.815714 306.420741 481.210687 8 h after light 515.7494715 506.207952 525.290991 12 h after light 536.3437895 369.67416 703.013419 4 h after dark 446.392934 305.523147 587.262721 8 h after dark 406.9447215 283.058031 530.831412 12 h after dark 352.847441 352.847441 352.847441