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  "documentType" : "symbol",
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  "identifier" : "/documentation/ARKit/ARFrame/lightEstimate",
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  "title" : "lightEstimate"
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# lightEstimate

An estimate of lighting conditions based on the camera image.

```
var lightEstimate: ARLightEstimate? { get }
```

## Discussion

If you render your own overlay graphics for the AR scene, you can use this information in shading algorithms to help make those graphics match the real-world lighting conditions of the scene captured by the camera. (The [`ARSCNView`](/documentation/ARKit/ARSCNView) class automatically uses this information to configure SceneKit lighting.)

This property’s value is `nil` if the [`isLightEstimationEnabled`](/documentation/ARKit/ARConfiguration/isLightEstimationEnabled) property of the session configuration that captured this frame is <doc://com.apple.documentation/documentation/Swift/false>.

---

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