condition	mean	min	max
4 h after light	16.394896499999998	15.882055	16.907738
8 h after light	16.4339415	15.916719	16.951164
12 h after light	18.3374635	15.925235	20.749692
4 h after dark	15.057663999999999	14.68201	15.433318
8 h after dark	13.681203	12.430947	14.931459
12 h after dark	19.926762	19.926762	19.926762