condition	mean	min	max
4 h after light	19.06655	15.7073	22.4258
8 h after light	20.92725	20.7179	21.1366
12 h after light	20.135550000000002	17.4967	22.7744
4 h after dark	21.448349999999998	20.5288	22.3679
8 h after dark	16.72295	15.5349	17.911
12 h after dark	22.71415	22.219	23.2093