diff --git a/monitoring/db/scripts/get_detailed_power.py b/monitoring/db/scripts/get_detailed_power.py
index 2449b2b..d585cc4 100755
--- a/monitoring/db/scripts/get_detailed_power.py
+++ b/monitoring/db/scripts/get_detailed_power.py
@@ -100,7 +100,7 @@ class Power:
 		return fname
 
 	def header(self):
-		hd  = "# all timestamp have unit miliseconds since unix epoch\n"
+		hd  = "# all timestamp have unit seconds since unix epoch\n"
 		hd += "# all power values have unit Watt\n"
 		hd += "timestamp,RESERVED,head_node_power,avg_node_power,median_node_power,min_node_power,max_node_power,std_dev_sample_node_power"
 		hd += "," + ",".join(self.nodes)
@@ -114,7 +114,7 @@ class Power:
 		return _body
 	
 	def _summarize_time(self, ts):
-		return Power.to_csv(ts, "")
+		return Power.to_csv(ts/1000., "")   # time in seconds
 
 	@staticmethod
 	def _summarize_values(df):