condition	mean	min	max
4 h after light	6.358483333333333	6.1952	6.60562
8 h after light	6.504076666666667	6.28305	6.72372
12 h after light	6.33189	6.22166	6.4825
4 h after dark	6.298286666666667	6.06727	6.690810000000001
8 h after dark	6.318753333333333	5.9618400000000005	6.8110800000000005
12 h after dark	6.26135	6.01334	6.563210000000001