condition mean min max 4 h after light 8.148813333333333 7.73182 8.42123 8 h after light 8.15364 8.0324 8.22795 12 h after light 7.594893333333333 7.365760000000001 7.79207 4 h after dark 9.294310000000001 9.024560000000001 9.44796 8 h after dark 9.618196666666666 9.380289999999999 10.08505 12 h after dark 9.918153333333334 9.72535 10.085360000000001