condition	mean	min	max
4 h after light	7.9141433333333335	7.624410000000001	8.06983
8 h after light	8.360083333333334	8.32196	8.4295
12 h after light	8.522423333333334	8.30176	8.71625
4 h after dark	8.15992	7.850410000000001	8.36017
8 h after dark	8.159783333333333	8.133980000000001	8.20093
12 h after dark	7.97614	7.81945	8.06072