condition	mean	min	max
4 h after light	7.541773333333333	7.461360000000001	7.6449300000000004
8 h after light	7.608373333333334	7.4455800000000005	7.806010000000001
12 h after light	7.30933	7.13088	7.49645
4 h after dark	7.7313600000000005	7.3720300000000005	8.0776
8 h after dark	7.780723333333333	7.5931	8.09131
12 h after dark	7.720386666666666	7.69035	7.76682