Not sure if this is the right forum for this.
Does anyone have any insight into how different types of fluorescent light ballasts affect sound systems?
- Old-style T12 magnetic ballasts
- Newer T12 or T8 electronic ballasts
- High-output ballasts (T8/T5)
- Commercial vs. residential ballasts
- Standard vs. cold-start
- "shop lights" with super-cheapo electronic ballasts
- CFL recessed light (the kind where the bulb and ballast are separate)
- Something else I haven't listed
How about other conditions such as failing lamps or improper grounding of fixtures? How would that affect sound systems?
I know that conventional wisdom is to not run signal wires near fluorescent lights. However, I'm wondering if that only applies to certain types of ballasts. The wisdom is old, but electronic ballasts are new. Magnetic ballasts operate at 60Hz; some of the electronic ballasts step up the frequency to reduce visible flicker.
Could it be that with a newer ballast it's no longer a concern? If it is necessary to run wires near fluorescent lights, what mitigation steps can be taken to minimize noise in the signal?