condition	mean	min	max
4 h after light	18.21895	18.0967	18.3412
8 h after light	17.86705	16.4729	19.2612
12 h after light	15.9252	15.4797	16.3707
4 h after dark	18.5111	18.1582	18.864
8 h after dark	16.3524	15.9345	16.7703
12 h after dark	18.2044	17.3091	19.0997