condition	mean	min	max
4 h after light	1666.5	1666.5	1666.5
8 h after light	1611.6	1362.9	1860.3
12 h after light	1579.1	1504.3	1653.9
4 h after dark	1569.15	1446.8	1691.5
8 h after dark	1519.25	1436.8	1601.7
12 h after dark	1466.45	1344.4	1588.5