condition	mean	min	max
4 h after light	17643.4	17643.4	17643.4
8 h after light	19511.75	16344.8	22678.7
12 h after light	16027.5	11709.0	20346.0
4 h after dark	11041.2	9440.9	12641.5
8 h after dark	9089.0	8582.1	9595.9
12 h after dark	11996.55	11253.5	12739.6