# vtkLightActor rendered size

**URL:** https://discourse.vtk.org/t/vtklightactor-rendered-size/12303
**Category:** Support
**Created:** [September 17, 2023, 2:42pm UTC](https://discourse.vtk.org/t/vtklightactor-rendered-size/12303 "2023-09-17T14:42:19Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![sboogert](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/s/59ef9b/32.png) [@sboogert](https://discourse.vtk.org/u/sboogert)
#### Post date: [September 17, 2023, 2:42pm UTC](https://discourse.vtk.org/t/vtklightactor-rendered-size/12303/1 "2023-09-17T14:42:19Z")

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I am trying to use `vtkLightActor` but the data I am visualising is rather large, so 10 m so 10000 mm. All my datas units are mm, so when I put add `vtkLightActor` to my renderer, it appears very small. I would expect I need to scale the actor using `vtkLightActor.SetScale`, but this does not appear to work. I have tested my application scaling everything down and I can view the `vtkLightActors`.

Any help much appreciated