Lotsa mis information about digital ballasts and RFI , all digi ballasts emit some amount of RFI but the only way they can cause your neighbors interference is if you have an open lead on your cable wiring .
Check all cable connections making sure their tight , any extra cable plugs on your tv or cable line splitters not in use will cause RFI to enter the cable system & cause problems with the interactive menues of neighbors tv sets , the cable company can track the RFI right to your home but its a simple fix .
No loose connections , no active cable wires not securely plugged into a tv , any extra cable inlets on tv's or unused spots on cable splitters should be filled with shorting plugs to block any RFI from entering the closed system , shorting plugs cost like 50 cents & can be bought off ebay or radio shack , RFI cannot enter a shielded cable wire or properly connected wiring , most people dont realize that extra cable inlet on their tv set marked antenna is where the RFI enters the system .
If you live close to HTG i reccomend getting their 600 watt digital ballast , i have over 30 of the htg digi 600's & they have all performed excellent for 7 yrs now with zero rfi fucking with the neighbors , htg digital ballasts are top of the line with the best no questions asked replacement policy , you get a full 5 yr guarantee with htg .
I would never dream of spending the extra cash on big name ballasts as they are all hype , i was buying from htg online till they opened a shop near Detroit now i go in person , htg inline fans are better than vortex as well .
Fuck all that heat from magnetics , get a htg digi 600 dimable ballast & be.done with it , their all 110 & 220 volt within the same ballast so all you gotta do is change power cords to run 220 volt & get more ballasts going on a single breaker .