I have been down this road. The lutron dimmer like most dimmers work by rapid cycling on and off. The RF noise is substantial and can be picked up in tubes, cables, and the dimmer may pollute your AC, even on a independent line.
If you have no sonic changes, that I do commend your system implementation and design.
LED do pollute the AC circuit. I would stick with halogen or incandescent. IF you use LED, buy LED specific dimmer switches. Careful with Lutron. They may introduce noise.