---
title: intensity
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/directionallightcomponent/intensity
---

# intensity

The intensity of the directional light, measured in lumen per square meter.

## Declaration

```swift
var intensity: Float
```

## Discussion

Discussion Lumen per square meter, also known as lux, measures how much light is spread over an area. It tells you how bright a surface appears based on the light it receives. The default value for this property is 2145.7078. Use the following table as an estimate for Lux levels:  |   |   |   |   |   |   |   |   |   |   |

## See Also

### Setting intensity and shadows

- [isRealWorldProxy](realitykit/directionallightcomponent/isrealworldproxy.md)