Hello!
Currently, only the ‘Adjust Area Light X/Y Size’ works and only for Rect Light.
It would be good to have these properties working for all VRay Lights.
Honestly I wasn’t aware these exist, I will have a quick look if we can support them.
I don’t remember when they implemented these settings, but having it on the RMB is super helpful, specially to change Intensity/Lightpower. It works even with SHIFT selected for fine adjustments.