condition	mean	min	max
4 h after light	6.634373333333333	6.46186	6.958239999999999
8 h after light	6.861986666666667	6.6322	7.3013699999999995
12 h after light	6.834820000000001	6.6097399999999995	7.1204600000000005
4 h after dark	6.94332	6.758830000000001	7.30381
8 h after dark	6.89465	6.5612	7.217569999999999
12 h after dark	6.862183333333333	6.689589999999999	7.17555