condition	mean	min	max
4 h after light	3.993803333333333	3.89716	4.17283
8 h after light	4.09382	3.9705699999999995	4.27621
12 h after light	4.103009999999999	3.97655	4.2624699999999995
4 h after dark	4.15721	3.9220800000000002	4.5952
8 h after dark	4.09579	4.01239	4.25697
12 h after dark	4.02101	3.90571	4.21445