condition	mean	min	max
4 h after light	4.6	4.6	4.6
8 h after light	7.45	3.0	11.9
12 h after light	21.05	19.1	23.0
4 h after dark	19.15	16.5	21.8
8 h after dark	5.0	2.8	7.2
12 h after dark	24.8	12.4	37.2