add Sheds 30W COB-RGB lights

lights/sheds_30w_cob_rgb.py

@@ -0,0 +1,16 @@
+from .common import BaseDMXLight
+
+
+class Sheds30WCOBRGB(BaseDMXLight):
+    name = "Sheds 30W COB-RGB"
+
+    def _dump(self):
+        return self.address, [
+            self.intensity,
+            self.red,
+            self.green,
+            self.blue,
+            0, # strobe
+            0, # mode
+            0, # speed
+        ]