condition	mean	min	max
4 h after light	7.8171100000000004	7.712160000000001	7.934260000000001
8 h after light	7.88836	7.75484	8.14589
12 h after light	8.070713333333332	8.031839999999999	8.092939999999999
4 h after dark	7.83931	7.56562	8.189910000000001
8 h after dark	7.624253333333334	7.581230000000001	7.6616100000000005
12 h after dark	7.716793333333333	7.495539999999999	7.983560000000001