condition	mean	min	max
4 h after light	6.353653333333333	6.26473	6.51436
8 h after light	6.30926	6.08639	6.54094
12 h after light	6.2797833333333335	6.19822	6.4153199999999995
4 h after dark	6.26259	6.236680000000001	6.3087800000000005
8 h after dark	6.2397599999999995	5.9473199999999995	6.46389
12 h after dark	6.4386133333333335	6.354080000000001	6.5959