condition	mean	min	max
4 h after light	19.2	19.2	19.2
8 h after light	31.6	19.5	43.7
12 h after light	21.45	9.0	33.9
4 h after dark	18.2	5.0	31.4
8 h after dark	51.6	45.6	57.6
12 h after dark	14.75	6.1	23.4