condition	mean	min	max
4 h after light	17.46473	16.696219	18.233241
8 h after light	15.5758465	13.514323	17.63737
12 h after light	18.8871565	15.925235	21.849078
4 h after dark	19.855466999999997	17.21791	22.493024
8 h after dark	20.117026000000003	19.000074	21.233978
12 h after dark	15.996883	15.996883	15.996883