condition	mean	min	max
4 h after light	17.7423	16.7854	18.6992
8 h after light	16.91355	16.8041	17.023
12 h after light	18.28485	18.0764	18.4933
4 h after dark	20.5482	19.6291	21.4673
8 h after dark	18.7879	18.6752	18.9006
12 h after dark	20.6468	20.2201	21.0735