# irradiance(atPoint:) Returns the radiance of the light as received at a specific point in the same scene. ``` func irradiance(atPoint point: vector_float3) -> Unmanaged ``` ## Parameters `point` A point in the same world coordinate space as the light. ## Return Value The color and intensity of the light’s effect on the specified point. ## Discussion Calling this method is equivalent to calling the [`irradiance(atPoint:colorSpace:)`](/documentation/ModelIO/MDLLight/irradiance(atPoint:colorSpace:)) method and passing the Rec. 709 color space. (See `kCGColorSpaceITUR_709`.) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)