condition	mean	min	max
4 h after light	6.69633	6.50409	7.03596
8 h after light	6.671326666666667	6.406540000000001	7.1986300000000005
12 h after light	6.404716666666667	6.31902	6.5365
4 h after dark	6.54186	6.26462	6.86828
8 h after dark	6.38762	6.25205	6.57412
12 h after dark	6.3789299999999995	6.15158	6.71444