Ah too bad, but you can't read something out of a device that isn't monitored...
I can now build my Besta cabinet even further and will create a sort of 'nest' to put my tv in.
Above the TV I will install 3 Omlopp/Vaxmyra lights facing down behind the TV and will put them on the small LED driver which will be connected to the bigger LED driver.
Then, I will monitor the TV's power to create a rule; If TV = on > dim the lights above the TV to 10% or something but the rest of the cabinet kan stay on like 70%.
All this can finally work using this plugin.