condition	mean	min	max
4 h after light	7.713673333333333	7.6663	7.7912
8 h after light	7.163163333333333	7.106669999999999	7.233339999999999
12 h after light	7.12453	7.0545800000000005	7.18273
4 h after dark	7.4945900000000005	7.375260000000001	7.56371
8 h after dark	7.329103333333333	7.214760000000001	7.4374899999999995
12 h after dark	7.609613333333333	7.394830000000001	7.900689999999999