RGBCW lightbulb: add Arlec Grid Connect downlight

PR #2840

custom_components/tuya_local/devices/rgbcw_lightbulb.yaml

@@ -19,6 +19,11 @@ products:
   - id: gshkqhi4fx9qqwrr
     manufacturer: ANWIO
     model: BR30 RGB+CCT 13W
+  - id: 1wyg8eca64whbtcd
+    manufacturer: Arlec
+    model: Grid Connect 6W RGB+CCT downlight
+    name: RGBCW downlight
+    model_id: ALD275HA
 entities:
   - entity: light
     dps: