noise and or rfi supression for dimmers for evaluation tests

The simplest filtering approach for dimmers is to place an inductor in series with the load, whose purpose is to limit the turn-on dI/dt slope across the mains wiring, thus dramatically reducing radiated EMI.

That inductor should be sized to handle the peak current drawn by the highest nominal load without saturating. The inductance value should be high enough to limit di/dt to reasonable values, take 5A/us as a refference, but low enough to avoid excessive lag in the current waveform.

For 230V AC mains and 2KW load, a 68uH 13A inductor would be fine.