condition	mean	min	max
4 h after light	16.7	16.7	16.7
8 h after light	18.85	18.8	18.9
12 h after light	7.05	2.0	12.1
4 h after dark	4.5	2.2	6.8
8 h after dark	12.05	10.1	14.0
12 h after dark	23.35	15.7	31.0