condition	mean	min	max
4 h after light	16.9	16.9	16.9
8 h after light	11.25	6.7	15.8
12 h after light	7.6	2.3	12.9
4 h after dark	14.15	0.8	27.5
8 h after dark	17.2	2.7	31.7
12 h after dark	4.5	0.6	8.4