RF shielding?

do most ballasts come with a RF shield output cord? If they dont they tend to cause interference with your tv, radio, etc. I am trying to buy a light set up and am not completely sure what to get, any tips will be greatly appreciated. My space is about 4x4, 4 ladies in 5-gal. Looking for a 400watt HPS MH multiple wattage e-ballast, preferably dimmable and can use HQI bulbs.

My old ballast output cords use ordinary 60hz wire. I never saw any RF when I used to use them.
All CFL now and still good.
I'm not sure what frequency a new ballast would operate on.