condition	mean	min	max
4 h after light	18.0147725	16.984091	19.045454
8 h after light	18.6328935	17.574837	19.69095
12 h after light	17.066139	16.557441	17.574837
4 h after dark	17.574837	17.574837	17.574837
8 h after dark	19.825263	18.645113	21.005413
12 h after dark	16.942186	16.942186	16.942186