condition	mean	min	max
4 h after light	19.5286665	18.849531	20.207802
8 h after light	19.0236085	16.50495	21.542267
12 h after light	16.025708	14.659266	17.39215
4 h after dark	17.6294975	16.346498	18.912497
8 h after dark	20.2163075	19.80099	20.631625
12 h after dark	17.228482	17.228482	17.228482