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# ambientIntensity

The estimated intensity, in lumens, of ambient light throughout the scene.

```
var ambientIntensity: CGFloat { get }
```

## Discussion

This value is based on the internal exposure compensation of the camera device, and scaled to be appropriate for use in rendering architectures that use realistic lighting metrics. A value of 1000 represents “neutral” lighting.

For example, you can pass this value directly to the <doc://com.apple.documentation/documentation/SceneKit/SCNLight/intensity> property of a SceneKit ambient light for lighting results that roughly match those of the real-world scene captured by the device camera. (However, passing this value to SceneKit is generally not necessary; the [`ARSCNView`](/documentation/ARKit/ARSCNView) class automatically sets SceneKit lighting based on this value.)

---

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