diff --git a/homeassistant/components/homekit/__init__.py b/homeassistant/components/homekit/__init__.py
index 24c6dfa8a76..025ef4069e9 100644
--- a/homeassistant/components/homekit/__init__.py
+++ b/homeassistant/components/homekit/__init__.py
@@ -126,7 +126,7 @@ def get_accessory(hass, state, aid, config):
                 or DEVICE_CLASS_CO2 in state.entity_id:
             a_type = 'CarbonDioxideSensor'
         elif device_class == DEVICE_CLASS_LIGHT or unit == 'lm' or \
-                unit == 'lux':
+                unit == 'lux' or unit == 'lx':
             a_type = 'LightSensor'
 
     elif state.domain == 'switch' or state.domain == 'remote' \
diff --git a/tests/components/homekit/test_get_accessories.py b/tests/components/homekit/test_get_accessories.py
index c26982e170b..76736ce45ad 100644
--- a/tests/components/homekit/test_get_accessories.py
+++ b/tests/components/homekit/test_get_accessories.py
@@ -125,6 +125,13 @@ class TestGetAccessories(unittest.TestCase):
                           {ATTR_UNIT_OF_MEASUREMENT: 'lux'})
             get_accessory(None, state, 2, {})
 
+    def test_light_sensor_unit_lx(self):
+        """Test light sensor with lx as unit."""
+        with patch.dict(TYPES, {'LightSensor': self.mock_type}):
+            state = State('sensor.light', '900',
+                          {ATTR_UNIT_OF_MEASUREMENT: 'lx'})
+            get_accessory(None, state, 2, {})
+
     def test_binary_sensor(self):
         """Test binary sensor with opening class."""
         with patch.dict(TYPES, {'BinarySensor': self.mock_type}):