Dedicated line (almost)

Bonjour, 

As most people are suggesting a dedicated line for best audio results, I check mine (to see if I can install one easily) and I found that, besides my audio equipment, I just have 3 LED lights on this line (dimmers in fact. Yes I know, dimmers are the worst thing). I can easily move these on another line (as they are consuming next to nothing) but I was wondering : If I always keep these 3 switches / dimmers off while I was listening music, will I have the same results as a dedicated line? Do you know if switches / dimmers set to off induce noise in the line?

Thanks...