condition	mean	min	max
0 h after light	10.171385	9.94547	10.3973
4 h after light	18.63725	18.5909	18.6836
8 h after light	18.5833	18.184	18.9826
4 h after dark	13.83225	12.2867	15.3778
8 h after dark	14.99495	14.6003	15.3896
12 h after dark	9.867245	9.47899	10.2555