Static on phone line caused by fluorescent light!

I have a large reef aquarium (can be seen here: reefcam.itaysworld.com) and after months of having an annoying noise on my phone line, I figured out that one of the fluorescent lights in the fixture is causing it (either the bulb or ballast - not sure).

 

The light fixture has 3 metal halide lamps and 2 sets of 2 fluorescent tubes. I double checked and its always the same tube that is on which causes the static on the line (both on wired and wireless phones).

 

My question is to all those with electrical experience out there -- is there a way to 'filter' whatever interference / electromagnetic energy that is being picked up by the phone wiring in my house?

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Answers

A loose magnetic ballast can be the cause of ballast hum and static. This can be caused by the ballast overheating due to tube flicker. Check that ballast mounting screws are tight to stop vibration. If the static is getting worst than usual  then the ballast may need to be replaced. Since this is the most expensive part it may well be worth buying a complete new fixture. Don't leave it too long as they have been known to overheat!

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