condition	mean	min	max
4 h after light	7.85702	7.658580000000001	7.9883
8 h after light	7.663933333333333	7.577789999999999	7.79202
12 h after light	8.182896666666666	8.0675	8.25999
4 h after dark	7.8807599999999995	7.669460000000001	8.0963
8 h after dark	7.9658066666666665	7.73295	8.29824
12 h after dark	7.9306399999999995	7.70413	8.0968