---
title: HMCharacteristicMetadataUnitsLux
framework: homekit
role: symbol
role_heading: Global Variable
path: homekit/hmcharacteristicmetadataunitslux
---

# HMCharacteristicMetadataUnitsLux

The unit of the characteristic is lux (that is, illuminance).

## Declaration

```swift
let HMCharacteristicMetadataUnitsLux: String
```