Add read only fields on ligh element serializer

arkindex/documents/serializers/light.py

@@ -41,6 +41,7 @@ class ElementLightSerializer(serializers.ModelSerializer):
             'type',
             'name',
         )
+        read_only_fields = ('id', 'type', 'name')
 
 
 class ElementZoneSerializer(ElementLightSerializer):