condition	mean	min	max
4 h after light	17.942948	16.485315	19.400581
8 h after light	16.543590000000002	15.735122	17.352058
12 h after light	16.409869999999998	14.458808	18.360932
4 h after dark	15.683564	13.835572	17.531556
8 h after dark	14.899148	14.444167	15.354129
12 h after dark	14.537555	14.537555	14.537555