Help troubleshooting fluorescent lights

[jslo]

^This is where I'd start. Next time it acts up, by-pass the switch to eliminate it.

[th3w01f]

^This is where I'd start. Next time it acts up, by-pass the switch to eliminate it.

The group of 2 lights is on a 3 way and the 6 is on a single pole. Is there any way that a single switch could be impacting all of them?

[68Charger]

The group of 2 lights is on a 3 way and the 6 is on a single pole. Is there any way that a single switch could be impacting all of them?

What was the voltage input to the fixtures when they won't light?

I have a light fixture here in Texas that wouldn't light when it was very humid... it worked when it was drier, and as long as we leave it on, it works fine.

[SideShow Bob]

The group of 2 lights is on a 3 way and the 6 is on a single pole. Is there any way that a single switch could be impacting all of them?

Start by looking for loose/bad connections common to both the single pole & 3 way circuits.

Esspecially if things were wired using the stab in quick wire method instead of using the side wire screws. (See attached picture).

I can't count the number of intermittent wiring problems I have found due to electricians (?) using the quick wire method....