I'm making a scene with a submarine like corridor, and there are multiple revolving siren like lights.
The issue is they're all spinning at the same time and it's not realistic, but I don't want to have multiple copies of the same geometry in the scene as it's quite heavy.
What I would like to do is take the rotating emissive part in the linked file and have it spin at a constant speed, but it's rotation start on a random frame, so that every copy would be slightly out of sync with the other.
I do have other instanced objects where I've made material node groups to change their colour at random with each instance, but I think this would be a Geometry Nodes thing and I don't really know what to do with those, only "what I'd like to do".
Any help, either with Geonodes or another method would be greatly appreciated.