Usually EVERYTHING electrical contributes to interference....the more you got, the more likely it will be. I have seen firsthand how something like that has caused a crash. Investigation has shown that using a certain power box, range was limited. Switching on the landing light caused even more losses. Flying was fine, but after lowering the gear and turning on the light, it went out of control and impacted before we even knew what was going on.
I don't know how your specific electronic will react, but put together your entire system and do extensive range tests under flying conditions (worst-case-schenario....all lights and strobes on, control surfaces moving, engines running, various angles). If you're not happy with the results, turn off the components one by one to see what's causing the problems, and remove it.

What exactly is this circuit? Where do you get it from? Price and link? I'm also looking for such a thing, but was planning on using a homemade control box to "talk to" luxeon emitters. I have an excellent source for these...but i definetly want to look into this circuit and strobe.
Best regards
Hank