By standard hanging kit it means 4 little holes to create your own means of hanging.
The premium hanging kit is just 2 metal cables and a base plate that doesn't come with the screws.
Ecotech hasn't even responded regarding this!
To see my thread just click my name and do find posts.
I have all my lights at a 20k look at 25% intensity max. Plan on upping it to a 30% max while I'm away in Cleveland.
My cousin brought over his AI sol blue and the ecotech wins hands down. The colors I can create and overall look seemed a lot better. Now the only main gripe is they're $750 compared to $400 and the hanging fiasco. Granted cost on the units is about $650, so either ecotech is making a pretty penny, or they're that quality of fixtures.