# Lux

> The unit of illuminance (lumen per square meter).

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine.Rendering](/engine/6000.0/script-reference/unityengine/rendering.md)
* **Assembly:** UnityEngine.CoreModule

```csharp
Lux = 2
```

### Remarks

A light source that emits 1 lumen of luminous flux onto an area of 1 square meter has an illuminance of 1 lux.

Compatible light types: [LightType.Directional](/engine/6000.0/script-reference/unityengine/lighttype/directional.md), [LightType.Box](/engine/6000.0/script-reference/unityengine/lighttype/box.md), [LightType.Point](/engine/6000.0/script-reference/unityengine/lighttype/point.md), [LightType.Spot](/engine/6000.0/script-reference/unityengine/lighttype/spot.md), [LightType.Pyramid](/engine/6000.0/script-reference/unityengine/lighttype/pyramid.md).

Additional Resources: [Light.lightUnit](/engine/6000.0/script-reference/unityengine/light/lightunit.md), [light component](/engine/6000.0/manual/lighting-overview/lighting-birp/class-light.md).