diff --git a/effects/light-clock.json b/effects/light-clock.json
index 1619bf51..7e1c3118 100644
--- a/effects/light-clock.json
+++ b/effects/light-clock.json
@@ -4,6 +4,7 @@
 	"args" :
 	{
 		"show_seconds" : true,
+		"marker-enabled" : false,
 		"hour-color" : [0,0,255],
 		"minute-color" : [0,255,0],
 		"second-color" : [255,0,0],
diff --git a/effects/light-clock.py b/effects/light-clock.py
index c0e84c5d..464d4e44 100644
--- a/effects/light-clock.py
+++ b/effects/light-clock.py
@@ -8,6 +8,7 @@ hC         = hyperion.args.get('hour-color', (0,0,255))
 mC  	   = hyperion.args.get('minute-color', (0,255,0))
 sC 		   = hyperion.args.get('second-color', (255,0,0))
 bgC		   = hyperion.args.get('background-color', (0,0,0))
+markEnable = hyperion.args.get('marker-enabled', False)
 markD      = int(hyperion.args.get('marker-depth', 5))/100.0
 markW      = int(hyperion.args.get('marker-width', 5))/100.0
 markC	   = hyperion.args.get('marker-color', (255,255,255))
@@ -66,7 +67,7 @@ while not hyperion.abort():
 
 	if showSec:
 		hyperion.imageCanonicalGradient(centerX, centerY, angleS, colorsSecond)
-	if markD > 0.0:
+	if markEnable:
 		#marker left, right, top, bottom
 		hyperion.imageDrawLine(0, centerY, 0+markDepthX, centerY, markThick, markC[0], markC[1], markC[2])
 		hyperion.imageDrawLine(int(hyperion.imageWidth()), centerY, int(hyperion.imageWidth())-markDepthX, centerY, markThick, markC[0], markC[1], markC[2])
@@ -74,4 +75,4 @@ while not hyperion.abort():
 		hyperion.imageDrawLine(centerX, int(hyperion.imageHeight()), centerX, int(hyperion.imageHeight())-markDepthY, markThick, markC[0], markC[1], markC[2])
 
 	hyperion.imageShow()
-	time.sleep(1)
\ No newline at end of file
+	time.sleep(0.5)
\ No newline at end of file
diff --git a/effects/schema/light-clock.schema.json b/effects/schema/light-clock.schema.json
index 6b634bd5..ce8cd8a6 100644
--- a/effects/schema/light-clock.schema.json
+++ b/effects/schema/light-clock.schema.json
@@ -60,23 +60,45 @@
 			"maxItems": 3,
 			"propertyOrder": 4
 		},
+		"show_seconds": {
+			"type": "boolean",
+			"title":"edt_eff_showseconds",
+			"default": true,
+			"propertyOrder" : 5
+		},
+		"marker-enabled" {
+			"type": "boolean",
+			"title": "edt_eff_markerEnable",
+			"default": false,
+			"propertyOrder" : 6
+		},
 		"marker-depth": {
 			"type": "integer",
 			"title": "edt_eff_markerDepth",
 			"default": 5,
-			"minimum" : 0,
+			"minimum" : 1,
 			"maximum" : 50,
 			"append" : "edt_append_percent",
-			"propertyOrder" : 5
+			"options": {
+				"dependencies": {
+					"marker-enabled": true
+				}
+			},
+			"propertyOrder" : 7
 		},
 		"marker-width": {
 			"type": "integer",
 			"title": "edt_eff_markerWidth",
 			"default": 5,
-			"minimum" : 0,
+			"minimum" : 1,
 			"maximum" : 25,
 			"append" : "edt_append_percent",
-			"propertyOrder" : 6
+			"options": {
+				"dependencies": {
+					"marker-enabled": true
+				}
+			},
+			"propertyOrder" : 8
 		},
 		"marker-color": {
 			"type": "array",
@@ -90,13 +112,12 @@
 			},
 			"minItems": 3,
 			"maxItems": 3,
-			"propertyOrder" : 7
-		},
-		"show_seconds": {
-			"type": "boolean",
-			"title":"edt_eff_showseconds",
-			"default": true,
-			"propertyOrder" : 8
+			"options": {
+				"dependencies": {
+					"marker-enabled": true
+				}
+			},
+			"propertyOrder" : 9
 		}
 	},
 	"additionalProperties": false