condition	mean	min	max
4 h after light	18424.9	18424.9	18424.9
8 h after light	18742.050000000003	18214.9	19269.2
12 h after light	16811.1	16327.4	17294.8
4 h after dark	14939.65	13990.9	15888.4
8 h after dark	11926.65	11061.0	12792.3
12 h after dark	11731.650000000001	10136.2	13327.1