diff --git a/tests/test_device_types.py b/tests/test_device_types.py
index e7f306f..4fb66a3 100644
--- a/tests/test_device_types.py
+++ b/tests/test_device_types.py
@@ -130,8 +130,8 @@ async def test_power_on_uses_lighting_service(self):
         with patch.object(device, '_pass_through_request', new_callable=AsyncMock) as mock:
             await device.power_on()
             mock.assert_called_once_with(
-                'smartlife.iot.smartbulb.lightingservice',
-                'transition_light_state',
+                'smartlife.iot.lightStrip',
+                'set_light_state',
                 {'on_off': 1}
             )
 
@@ -143,8 +143,8 @@ async def test_set_color(self):
         with patch.object(device, '_pass_through_request', new_callable=AsyncMock) as mock:
             await device.set_color(hue=240, saturation=100, brightness=75)
             mock.assert_called_once_with(
-                'smartlife.iot.smartbulb.lightingservice',
-                'transition_light_state',
+                'smartlife.iot.lightStrip',
+                'set_light_state',
                 {'on_off': 1, 'hue': 240, 'saturation': 100,
                  'color_temp': 0, 'brightness': 75}
             )
@@ -157,8 +157,8 @@ async def test_set_color_temp(self):
         with patch.object(device, '_pass_through_request', new_callable=AsyncMock) as mock:
             await device.set_color_temp(color_temp=4000)
             mock.assert_called_once_with(
-                'smartlife.iot.smartbulb.lightingservice',
-                'transition_light_state',
+                'smartlife.iot.lightStrip',
+                'set_light_state',
                 {'on_off': 1, 'color_temp': 4000}
             )
 
@@ -188,8 +188,8 @@ async def test_set_brightness(self):
         with patch.object(device, '_pass_through_request', new_callable=AsyncMock) as mock:
             await device.set_brightness(50)
             mock.assert_called_once_with(
-                'smartlife.iot.smartbulb.lightingservice',
-                'transition_light_state',
+                'smartlife.iot.lightStrip',
+                'set_light_state',
                 {'on_off': 1, 'brightness': 50}
             )
 
diff --git a/tplinkcloud/kl420l5.py b/tplinkcloud/kl420l5.py
index 327e915..54430e8 100644
--- a/tplinkcloud/kl420l5.py
+++ b/tplinkcloud/kl420l5.py
@@ -1,7 +1,11 @@
 from .device_type import TPLinkDeviceType
 from .device import TPLinkDevice
 
-_LIGHTING_SERVICE = 'smartlife.iot.smartbulb.lightingservice'
+# The KL42x/KL43x light strips do not support the smartbulb lighting
+# service (err_code -2001 'module not support'); they use the
+# lightStrip module with set_light_state. Verified against a live
+# KL420L5(US).
+_LIGHTING_SERVICE = 'smartlife.iot.lightStrip'
 
 
 class KL420L5LightState:
@@ -79,7 +83,7 @@ async def set_light_state(self, on_off=None, brightness=None, hue=None,
         if transition_period is not None:
             state['transition_period'] = transition_period
         return await self._pass_through_request(
-            _LIGHTING_SERVICE, 'transition_light_state', state)
+            _LIGHTING_SERVICE, 'set_light_state', state)
 
     async def power_on(self):
         return await self.set_light_state(on_off=1)
diff --git a/tplinkcloud/kl430.py b/tplinkcloud/kl430.py
index 3881c75..bfdefcd 100644
--- a/tplinkcloud/kl430.py
+++ b/tplinkcloud/kl430.py
@@ -1,7 +1,11 @@
 from .device_type import TPLinkDeviceType
 from .device import TPLinkDevice
 
-_LIGHTING_SERVICE = 'smartlife.iot.smartbulb.lightingservice'
+# The KL42x/KL43x light strips do not support the smartbulb lighting
+# service (err_code -2001 'module not support'); they use the
+# lightStrip module with set_light_state. Verified against a live
+# KL420L5(US).
+_LIGHTING_SERVICE = 'smartlife.iot.lightStrip'
 
 
 class KL430LightState:
@@ -79,7 +83,7 @@ async def set_light_state(self, on_off=None, brightness=None, hue=None,
         if transition_period is not None:
             state['transition_period'] = transition_period
         return await self._pass_through_request(
-            _LIGHTING_SERVICE, 'transition_light_state', state)
+            _LIGHTING_SERVICE, 'set_light_state', state)
 
     async def power_on(self):
         return await self.set_light_state(on_off=1)