condition	mean	min	max
4 h after light	19506.7	19506.7	19506.7
8 h after light	19369.800000000003	16701.4	22038.2
12 h after light	19192.15	18561.1	19823.2
4 h after dark	18108.4	16569.9	19646.9
8 h after dark	17542.65	15520.1	19565.2
12 h after dark	18505.800000000003	17050.2	19961.4