condition	mean	min	max
4 h after light	19.12534	19.12534	19.12534
8 h after light	17.5265425	15.663568	19.389517
12 h after light	15.776905000000001	13.892236	17.661574
4 h after dark	20.090751500000003	19.12534	21.056163
8 h after dark	18.503807000000002	17.922721	19.084893
12 h after dark	19.12534	19.12534	19.12534