I've read similar posts that have similar problems and they recommend trying different outlets. If I remember right there are a few people that have contacted various dealers about thier products and haven't gotten the most favorable replies. But this sounds like a serious problem as you could be interfering with someone else and draw attention to yourself as KushDog pointed out. Soooooo...I looked up some info for you. Contained herafter are various selections taking from various websites ..I'll try and include the addys.
Quality- When purchasing a digital ballast, the consumer must be aware that there are a few black sheep in the digital ballast family. There are many inferior quality digital ballasts on the market; these manufacturers proclaim amazing power savings but dont deliver. BetterGrow Hydro has looked at numerous digital ballasts over the past several years and we have settled on the Lumatek brand for specific reasons. Below are the results of our in store tests with various brands of ballasts. Gathering data was conducted using a wattage meter and a Hanna Light Meter, both of which are available to our customers should they wish to purchase these meters and run their own tests.
The tests follow this selection on the source page.
600w Lumatek Moderate Interference.
none
600w Galaxy Extreme interference (Cannot hear radio transmission) when bulb fires (lasts about 30 seconds), Once bulbs has fired and the lamp is being maintained RF interference is High (Can hear radio broadcast but with considerable static).
none
750w LumatekModerate Interference for 2-5 seconds while the ballast first fires bulb. No interference after bulb successfully fires.
none
1000w Evolution Moderate Interference
none
30ft AM 30ft FM 600w Lumatek Slight interference (Radio broadcast is clear with a slight amount of interference in the background).
none
600w Galaxy Slight interference (Radio broadcast is clear with a slight amount of interference in the background).
none
750w Lumateknone
none
1000w Evolution Slight interference (Radio broadcast is clear with a slight amount of interference in the background).
none
RF Interference -
Customers should avoid all digital ballasts that do not have RF shielded lamp cords. The RF interference from these digital ballasts is substantial. If you do not see a metal shield between the outer coat and the wires on the inside of the lamp cord, the cord is not shielded. Digital ballasts do not interfere with FM radio stations but do cause static on AM stations. The better quality digital ballasts, such as the Lumatek, cause the least amount of interference. It should be noted here that the 750w Lumatek ballast we tested was of their latest revision. Ironically, this revision does not utilize an RF shielded lamp cord; Lumatek claims that this is due to internal changes made to the ballast that make the RF shielding unnecessary, and as you can see by the test results, it produced virtually no interference after the first few seconds. Lumatek claims that all of their ballasts will utilize this same construction in the near future. Same page..