condition	mean	min	max
4 h after light	17.5193	17.1254	17.9132
8 h after light	18.56095	17.4719	19.65
12 h after light	18.7815	18.2942	19.2688
4 h after dark	22.7209	21.9416	23.5002
8 h after dark	20.8507	19.9984	21.703
12 h after dark	19.7746	19.1946	20.3546