---
title: "irradiance(atPoint:)"
framework: modelio
role: symbol
role_heading: Instance Method
path: "modelio/mdllight/irradiance(atpoint:)"
---

# irradiance(atPoint:)

Returns the radiance of the light as received at a specific point in the same scene.

## Declaration

```swift
func irradiance(atPoint point: vector_float3) -> Unmanaged<CGColor>
```

## Parameters

- `point`: A point in the same world coordinate space as the light.

## Return Value

Return Value The color and intensity of the light’s effect on the specified point.

## Discussion

Discussion Calling this method is equivalent to calling the irradiance(atPoint:colorSpace:) method and passing the Rec. 709 color space. (See kCGColorSpaceITUR_709.)

## See Also

### Working with Lights

- [irradiance(atPoint:colorSpace:)](modelio/mdllight/irradiance(atpoint:colorspace:).md)
- [lightType](modelio/mdllight/lighttype.md)
- [colorSpace](modelio/mdllight/colorspace.md)