condition	mean	min	max
4 h after light	17.7872695	16.264369	19.31017
8 h after light	16.622364	16.107085	17.137643
12 h after light	17.3453245	15.347854	19.342795
4 h after dark	17.9481455	17.531556	18.364735
8 h after dark	15.9254405	15.047395	16.803486
12 h after dark	15.573312	15.573312	15.573312