condition	mean	min	max
4 h after light	14.3601	12.5001	16.2201
8 h after light	13.90355	12.8524	14.9547
12 h after light	18.50425	16.5065	20.502
4 h after dark	20.845149999999997	19.6362	22.0541
8 h after dark	21.2392	20.6919	21.7865
12 h after dark	15.178550000000001	14.6051	15.752