condition mean min max 4 h after light 571.108097 523.830291 618.385903 8 h after light 487.45975599999997 486.078211 488.841301 12 h after light 492.6661365 480.624541 504.707732 4 h after dark 410.238001 368.936253 451.539749 8 h after dark 551.865219 532.790267 570.940171 12 h after dark 630.155134 630.155134 630.155134