I have a 4' Florescent fixture with 2 F40cw tubes.
The tubes look like there half lit, sometimes they will fully light & other
times there very low.
I don't know if it is the fixture or tubes that are bad.
I took 2 tubes out of another fixture that works properly & put them in the
Fixture in question & they also lit very low.
So next i put the questonable Tubes in the good fixture & they also lit very
low in the good fixture.
So i am back to the question which are bad or if the Tubes & fixture are
both bad.

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Dell Inspiron
Pentium dual-core 2.2 GHz
2 GB DDR2 SDRAM
Windows Vista Home Premium SP1