---
title: constantAttenuation
framework: Professional Video Applications
role: symbol
role_heading: Instance Property
platforms: [fxplug 4.0+]
path: professional_video_applications/fxlight/constantattenuation
---

# constantAttenuation

The constant term of the lighting falloff equation.

## Declaration

```swift
var constantAttenuation: Float
```

## Discussion

Discussion Lighting falloff is governed by an equation that contains constant, linear, and quadratic terms.

## See Also

### Properties

- [version](professional_video_applications/fxlight/version.md)
- [time](professional_video_applications/fxlight/time.md)
- [lightType](professional_video_applications/fxlight/lighttype.md)
- [color](professional_video_applications/fxlight/color.md)
- [intensity](professional_video_applications/fxlight/intensity.md)
- [linearAttenuation](professional_video_applications/fxlight/linearattenuation.md)
- [quadraticAttenuation](professional_video_applications/fxlight/quadraticattenuation.md)
- [castsShadows](professional_video_applications/fxlight/castsshadows.md)
- [spotCutoff](professional_video_applications/fxlight/spotcutoff.md)
- [spotPenumbraCutoff](professional_video_applications/fxlight/spotpenumbracutoff.md)
- [position](professional_video_applications/fxlight/position.md)
- [direction](professional_video_applications/fxlight/direction.md)