condition	mean	min	max
4 h after light	7.51762	7.032589999999999	7.80813
8 h after light	7.23678	7.14245	7.37237
12 h after light	7.196856666666666	6.6041	7.62122
4 h after dark	7.393596666666666	7.321039999999999	7.48452
8 h after dark	7.320446666666666	7.195539999999999	7.485239999999999
12 h after dark	7.33545	7.10087	7.522460000000001