Nesting folders under actors (world outliner)


I was wanting to know if there is a way of doing the following. I am trying to tidy up what will end up being quite a variety/number of lights in my lightrig

I need to be able to have a global scale on my lights, so I have put them under a empty actor which I can scale up.

I want to now create a folder to put all these rect lights in. It won’t let me do that, it says “cannot attach folders to actors”


Is there a work around I can use here? Or another node type to globally scale my lights, that will allow nested folders?