Dimmers and LEDs

[Heptagon]

Just to be clear what I am asking - I will include a mud-map:

I am aware that connection A is a no-no, and think I understand why - the fast ramp-up of voltage at the start of each cycle causes heavy currents in capacitive loads which are found in LED lighting luminaires.

Connection B we have used in the past (but not in our current venue). It seems to me that it must be fairly safe - since any radio frequency (RF) signal sent up the line by the dimmer pack should be minor by the time it gets through the 3-phase wiring.

I am interested in the connections C and D, where a small (single or 2 channel DMX dimmer is used to control a low wattage tungsten bulb (or 2) (or even a dimmable LED). This will be necessary when we have to drive a practical lamp or something similar on-stage. At present we are using a 12v DC DMX decoder and 12v bulbs - but they are inconvenient.

Is there any risk of damage by the RF from the small dimmer to the LED luminaire?

 

[timsabre]

No. As you say A is bad but all the others are fine. It isn't RF that's the problem, it's the chopped up mains waveform which comes out of a dimmer.