---
title: sphericalHarmonicsLevel
framework: modelio
role: symbol
role_heading: Instance Property
path: modelio/mdllightprobeirradiancedatasource/sphericalharmonicslevel
---

# sphericalHarmonicsLevel

The number of levels of spherical harmonics information provided by the data source.

## Declaration

```swift
optional var sphericalHarmonicsLevel: Int { get set }
```

## Discussion

Discussion Each level of spherical harmonics contains more coefficients, and thus affects the layout of the data containing those coefficients. For details, see the sphericalHarmonicsCoefficients(atPosition:) method.

## See Also

### Providing Light Probe Information

- [boundingBox](modelio/mdllightprobeirradiancedatasource/boundingbox.md)
- [sphericalHarmonicsCoefficients(atPosition:)](modelio/mdllightprobeirradiancedatasource/sphericalharmonicscoefficients(atposition:).md)