condition mean min max 4 h after light 9.297397 9.15536 9.439434 8 h after light 8.1491505 7.283587 9.014714 12 h after light 8.9457575 8.060683 9.830832 4 h after dark 9.038802 9.014714 9.06289 8 h after dark 9.208438000000001 8.764668 9.652208 12 h after dark 11.074471 11.074471 11.074471