condition	mean	min	max
4 h after light	13.238800000000001	12.8282	13.6494
8 h after light	7.85168	7.3865	8.31686
12 h after light	12.7287	12.1251	13.3323
4 h after dark	16.7163	15.2901	18.1425
8 h after dark	20.94245	20.4495	21.4354
12 h after dark	19.41445	19.2749	19.554