condition	mean	min	max
4 h after light	6.451849999999999	6.28241	6.56982
8 h after light	6.3866266666666665	6.0826400000000005	6.582139999999999
12 h after light	6.34096	6.19543	6.41713
4 h after dark	6.325926666666667	6.20348	6.46906
8 h after dark	6.48744	6.43153	6.54173
12 h after dark	6.607223333333334	6.49671	6.776210000000001