condition	mean	min	max
4 h after light	19.7	19.7	19.7
8 h after light	18.3	17.6	19.0
12 h after light	18.35	13.2	23.5
4 h after dark	9.7	2.4	17.0
8 h after dark	20.15	8.8	31.5
12 h after dark	10.7	6.4	15.0