condition	mean	min	max
4 h after light	7.959793333333333	7.95717	7.963139999999999
8 h after light	8.051263333333333	7.923369999999999	8.14585
12 h after light	8.23432	8.217419999999999	8.266910000000001
4 h after dark	7.955193333333333	7.583260000000001	8.181189999999999
8 h after dark	7.84606	7.75972	7.93934
12 h after dark	7.65499	7.52738	7.72687