condition	mean	min	max
4 h after light	21.6	21.6	21.6
8 h after light	21.6	19.8	23.4
12 h after light	16.3	8.6	24.0
4 h after dark	12.65	1.5	23.8
8 h after dark	19.4	16.0	22.8
12 h after dark	14.9	13.3	16.5