condition	mean	min	max
4 h after light	6.9186266666666665	6.829089999999999	6.9863800000000005
8 h after light	6.7712200000000005	6.5919300000000005	7.0715
12 h after light	6.49597	6.38731	6.66206
4 h after dark	7.83375	7.65234	8.01309
8 h after dark	8.60526	8.37088	8.75959
12 h after dark	9.551523333333334	9.44041	9.60847