condition	mean	min	max
4 h after light	18.70115	15.2235	22.1788
8 h after light	14.880700000000001	13.9761	15.7853
12 h after light	17.4219	15.6508	19.193
4 h after dark	19.747149999999998	16.5997	22.8946
8 h after dark	21.902900000000002	21.5831	22.2227
12 h after dark	23.46295	22.2513	24.6746