condition	mean	min	max
4 h after light	1.65522	1.64878	1.66166
8 h after light	2.62338	2.5306	2.71616
12 h after light	12.97505	12.6346	13.3155
4 h after dark	20.341450000000002	20.1955	20.4874
8 h after dark	18.9535	18.2093	19.6977
12 h after dark	9.367560000000001	8.80679	9.92833