condition mean min max 4 h after light 5.049325 4.12405 5.9746 8 h after light 5.78567 5.66088 5.91046 12 h after light 7.979585 7.94682 8.01235 4 h after dark 10.177735 9.51537 10.8401 8 h after dark 8.88665 8.65974 9.11356 12 h after dark 8.076509999999999 7.93234 8.22068