diff --git a/daylight-trigger.py b/daylight-trigger.py
index 96502fa..1a3dd41 100755
--- a/daylight-trigger.py
+++ b/daylight-trigger.py
@@ -3,6 +3,7 @@
 # Copyright 2019, Mischa Peters <mischa AT high5 DOT nl>, High5!.
 # Version 1.0 - 20191030
 #
+# Control a light based on sensor information
 # Get ['dark'] from sensor ID and switch on/off light ID
 # depending where your sensor is located you can use ['daylight']
 #
@@ -20,7 +21,7 @@ import ssl
 import urllib.request
 import json
 
-parser = argparse.ArgumentParser(description="Turn light on")
+parser = argparse.ArgumentParser(description="Control light based on light sensor")
 parser.add_argument("bridge", type=str, help="Hue Bridge IP")
 parser.add_argument("token", type=str, help="Hue API Token")
 parser.add_argument("-s", "--sensor", type=int, required=True, help="sensor id#")
diff --git a/get-groups.py b/get-groups.py
index d1c6446..848a8c1 100755
--- a/get-groups.py
+++ b/get-groups.py
@@ -19,7 +19,7 @@ import ssl
 import urllib.request
 import json
 
-parser = argparse.ArgumentParser(description="Get all sensors from Hue Bridge")
+parser = argparse.ArgumentParser(description="Get all group ids from Hue Bridge")
 parser.add_argument("bridge", type=str, help="Hue Bridge IP")
 parser.add_argument("token", type=str, help="Hue API Token")
 
diff --git a/get-lights.py b/get-lights.py
index 43660ad..9a6fd26 100755
--- a/get-lights.py
+++ b/get-lights.py
@@ -19,7 +19,7 @@ import ssl
 import urllib.request
 import json
 
-parser = argparse.ArgumentParser(description="Get all sensors from Hue Bridge")
+parser = argparse.ArgumentParser(description="Get all light ids from Hue Bridge")
 parser.add_argument("bridge", type=str, help="Hue Bridge IP")
 parser.add_argument("token", type=str, help="Hue API Token")
 
diff --git a/get-sensors.py b/get-sensors.py
index 2da7ef4..3ad480f 100755
--- a/get-sensors.py
+++ b/get-sensors.py
@@ -22,7 +22,7 @@ import json
 import re
 import collections
 
-parser = argparse.ArgumentParser(description="Get all sensors from Hue Bridge")
+parser = argparse.ArgumentParser(description="Get all sensor ids from Hue Bridge")
 parser.add_argument("bridge", type=str, help="Hue Bridge IP")
 parser.add_argument("token", type=str, help="Hue API Token")
 
diff --git a/groupctl.py b/groupctl.py
index 559fa47..4d89913 100755
--- a/groupctl.py
+++ b/groupctl.py
@@ -3,10 +3,10 @@
 # Copyright 2019, Mischa Peters <mischa AT high5 DOT nl>, High5!.
 # Version 1.0 - 20191102
 #
-# Control a light or plug
+# Control a group of lights (room)
 #
 # For example:
-# $ groupctl.py <bridge IP> <token> -i 24 -a on
+# $ groupctl.py <bridge IP> <token> -g 4 -a on
 #
 # Follow the steps at the Hue Developer site to get the username/token
 # https://developers.meethue.com/develop/get-started-2/
@@ -19,10 +19,10 @@ import ssl
 import urllib.request
 import json
 
-parser = argparse.ArgumentParser(description="Control group lights (room)")
+parser = argparse.ArgumentParser(description="Control group of lights (room)")
 parser.add_argument("bridge", type=str, help="Hue Bridge IP")
 parser.add_argument("token", type=str, help="Hue API Token")
-parser.add_argument("-i", "--id", type=int, required=True, help="light id#")
+parser.add_argument("-g", "--group", type=int, required=True, help="group id#")
 parser.add_argument("-a", "--action", type=str, default='on', help="on|off|relax|bright|dimmed|nightlight")
 parser.add_argument("-v", "--verbose", action='store_true', help="verbose")
 parser.add_argument("-d", "--debug", action='store_true', help="debug")
@@ -31,7 +31,7 @@ try:
 	args = parser.parse_args()
 	bridge = args.bridge
 	token = args.token
-	group_id = args.id
+	group = args.group
 	action = args.action
 	verbose = args.verbose
 	debug = args.debug
@@ -92,5 +92,5 @@ def put_state(id, state):
 	if verbose or debug: print (f"{res.status} {res.reason}")
 	return(res)
 
-group_state = get_state(group_id)
-put_state(group_id, group_state)
+group_state = get_state(group)
+put_state(group, group_state)
diff --git a/lightctl.py b/lightctl.py
index 82bf24a..40d5007 100755
--- a/lightctl.py
+++ b/lightctl.py
@@ -6,7 +6,7 @@
 # Control a light or plug
 #
 # For example:
-# $ lightctl.py <bridge IP> <token> -i 24 -a relax
+# $ lightctl.py <bridge IP> <token> -l 24 -a relax
 #
 # Follow the steps at the Hue Developer site to get the username/token
 # https://developers.meethue.com/develop/get-started-2/