condition	mean	min	max
4 h after light	14.9265635	13.62206	16.231067
8 h after light	17.0302075	14.677247	19.383168
12 h after light	18.5821325	17.057308	20.106957
4 h after dark	15.1595355	14.9771	15.341971
8 h after dark	17.967908	16.964996	18.97082
12 h after dark	16.521149	16.521149	16.521149