condition mean min max 4 h after light 6.744574999999999 6.42388 7.06527 8 h after light 8.101005 7.89103 8.31098 12 h after light 16.584049999999998 15.6756 17.4925 4 h after dark 16.2756 14.6285 17.9227 8 h after dark 12.40445 12.2616 12.5473 12 h after dark 10.201730000000001 9.70686 10.6966