Is it possible that street lights outside my house can cause interfence with my electric guitar?
for starters, I don’t know of any street lights that use fluorescent tubes unless they are the tiny compact fluorescents…and even those are rare to see. If the store thinks the lamps there are causing amp interference, I’d say they are probably wrong. When they are plugging those into the wall outlets they may be getting dirty (unreliable) power that’s causing spikes in the system – thus disturbing the amps. The amp itself may also be getting interference from other very nearby power sources. Electrical circuits all give off a little bit of an electromagnetic field. If there are many “hot” wires, or power that are all using the same Neutral conductor (used to be you could have 3 wires supplying power and all returning back to the panel on one neutral wire) they may be causing something called Harmonics, which can interfere with electrical equipment like computers. To counteract harmonics, hospitals and building with a lot of electrical devices oversize the neutral or use many neutral
