condition	mean	min	max
4 h after light	6.386293333333334	6.30543	6.47425
8 h after light	6.42135	6.276	6.67092
12 h after light	6.252026666666667	6.12973	6.3510800000000005
4 h after dark	6.32786	6.11125	6.51715
8 h after dark	6.40842	6.30558	6.58852
12 h after dark	6.424633333333333	6.3977699999999995	6.46884