diff --git a/src/main/angular/src/app/editor/parts/light/Light.ts b/src/main/angular/src/app/editor/parts/light/Light.ts
index 0e0bad3..4c3a297 100644
--- a/src/main/angular/src/app/editor/parts/light/Light.ts
+++ b/src/main/angular/src/app/editor/parts/light/Light.ts
@@ -57,7 +57,7 @@ export class Light extends Part {
     if (this.defect) {
       return "#6e4122"
     }
-    return fadeColor(this.voltage / this.voltageMax, "#888", "#FF0");
+    return fadeColor(Math.abs(this.voltage) / this.voltageMax, "#888", "#FF0");
   }
 
 }