I had an interesting application over the weekend and something stuck in my head about JUST THIS sort of thing. Mine was "gee, I need to make a deep red scene at like 50% intensity", so I cheated. I didn't make the scene, but I loaded my dark red scene, then hit control and dim on one, and that wasn't it, tried alt, didn't work any better, then hit Shift and I was happy. So, in this case, all my "like fixtures" did the same thing.
So, this can definately apply to movers as well. There's not reason why it wouldn't work. But there are other easier options depending on how you need your lighting design:
You can simply have lights be on the same channel. But chances are you would want oeral more control so that idea may not be practical.
I'd also suggest saving additional scenes and SAVE OFTEN ad in a back-up location like a USB memory stick too.
Have fun. I sure am glad deveopers crammed that feature in there.