condition	mean	min	max
0 h after light	6.9851600000000005	6.80206	7.16826
4 h after light	6.05783	5.03563	7.08003
8 h after light	17.430149999999998	15.9633	18.897
4 h after dark	19.70015	16.5199	22.8804
8 h after dark	13.94125	13.5734	14.3091
12 h after dark	6.396240000000001	5.36618	7.4263