condition	mean	min	max
4 h after light	4.1	4.1	4.1
8 h after light	9.85	5.0	14.7
12 h after light	12.55	7.6	17.5
4 h after dark	17.4	13.9	20.9
8 h after dark	24.75	19.7	29.8
12 h after dark	14.6	5.2	24.0