---
title: HKMetadataKeyMaximumLightIntensity
framework: healthkit
role: symbol
role_heading: Global Variable
path: healthkit/hkmetadatakeymaximumlightintensity
---

# HKMetadataKeyMaximumLightIntensity

A key that indicates the maximum intensity of light for an outdoor time sample.

## Declaration

```swift
let HKMetadataKeyMaximumLightIntensity: String
```

## Discussion

Discussion The expected value type is an HKQuantity expressed in lux().

## See Also

### Constants

- [HKDataTypeIdentifierStateOfMind](healthkit/hkdatatypeidentifierstateofmind.md)
- [HKMetadataKeyAppleFitnessPlusCatalogIdentifier](healthkit/hkmetadatakeyapplefitnesspluscatalogidentifier.md)
- [HKPredicateKeyPathWorkoutEffortRelationship](healthkit/hkpredicatekeypathworkouteffortrelationship.md)