condition	mean	min	max
4 h after light	21.089242	21.000092	21.178392
8 h after light	18.2075965	17.998839	18.416354
12 h after light	17.8869735	17.357593	18.416354
4 h after dark	18.467254999999998	15.305606	21.628904
8 h after dark	15.7217105	15.012454	16.430967
12 h after dark	19.045454	19.045454	19.045454