condition	mean	min	max
4 h after light	7.479139999999999	7.2328399999999995	7.608789999999999
8 h after light	7.468313333333334	7.12568	7.6852100000000005
12 h after light	7.565813333333334	7.3319600000000005	7.7642
4 h after dark	7.766943333333334	7.318630000000001	8.09757
8 h after dark	7.701223333333334	7.43116	7.8606
12 h after dark	7.431263333333334	7.27786	7.55571