diff --git a/homeassistant/components/airthings/sensor.py b/homeassistant/components/airthings/sensor.py
index a0d9c97c8c8..f2bf8e071f7 100644
--- a/homeassistant/components/airthings/sensor.py
+++ b/homeassistant/components/airthings/sensor.py
@@ -14,6 +14,7 @@ from homeassistant.const import (
     CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
     CONCENTRATION_PARTS_PER_BILLION,
     CONCENTRATION_PARTS_PER_MILLION,
+    LIGHT_LUX,
     PERCENTAGE,
     SIGNAL_STRENGTH_DECIBELS,
     EntityCategory,
@@ -78,6 +79,12 @@ SENSORS: dict[str, SensorEntityDescription] = {
         translation_key="light",
         state_class=SensorStateClass.MEASUREMENT,
     ),
+    "lux": SensorEntityDescription(
+        key="lux",
+        device_class=SensorDeviceClass.ILLUMINANCE,
+        native_unit_of_measurement=LIGHT_LUX,
+        state_class=SensorStateClass.MEASUREMENT,
+    ),
     "virusRisk": SensorEntityDescription(
         key="virusRisk",
         translation_key="virus_risk",