condition	mean	min	max
0 h after light	18.8388	17.1331	20.5445
4 h after light	9.27995	9.21401	9.34589
8 h after light	13.0282	12.7558	13.3006
4 h after dark	14.65245	11.4729	17.832
8 h after dark	16.3944	14.9991	17.7897
12 h after dark	16.16865	14.7087	17.6286