condition	mean	min	max
4 h after light	6.9364300000000005	6.790210000000001	7.14043
8 h after light	6.907216666666667	6.77693	6.9834
12 h after light	6.83959	6.73893	7.017110000000001
4 h after dark	6.910760000000001	6.644480000000001	7.27212
8 h after dark	6.738630000000001	6.32178	7.07615
12 h after dark	6.764353333333333	6.564710000000001	7.108289999999999