condition mean min max 4 h after light 7.233565 6.20642 8.26071 8 h after light 8.46243 7.21747 9.70739 12 h after light 9.23811 8.94494 9.53128 4 h after dark 11.263833333333334 10.5347 11.7507 8 h after dark 9.462246666666667 5.40064 12.0055 12 h after dark 7.35152 6.35471 7.94822