condition	mean	min	max
4 h after light	12.177795	11.533945	12.821645
8 h after light	15.365162	12.843498	17.886826
12 h after light	15.768775999999999	13.679553	17.857999
4 h after dark	14.622213	14.515109	14.729317
8 h after dark	19.556555	13.560392	25.552718
12 h after dark	11.907327	11.907327	11.907327