condition	mean	min	max
4 h after light	20.433128	18.019097	22.847159
8 h after light	18.468956499999997	15.451217	21.486696
12 h after light	15.715840499999999	15.696798	15.734883
4 h after dark	18.532224	18.508035	18.556413
8 h after dark	18.8733455	17.580194	20.166497
12 h after dark	17.176552	17.176552	17.176552