tek light issues (ballast?)

[kien]

I had this happen recently with my T5s. Thought it was ballast but I tried putting in fresh bulbs and that fixed it. Seems by bulbs were just blown even though they were only 8 months old. I'm not sure why but if one gues on a particular ballast they all seem to go. This would suggest to me that they are in series, which seems odd to me if that were the case. I honestly have no clue how they are wired as I've never openned mine up. At any rate, you could try fresh bulbs :-)

[gregzz4]

This is only an assumption based on most fluorescent ballasts I've dealt with, and not just aquarium ones ...

Looking at the #'s I'd guess the one labelled 2S54 is your 2-bulb, and the 4S54 is the 4-bulb ballast

Best way is to trace the wires inside the fixture - backwards from the bulbs that are out - to the ballast
Another way is to disconnect the power to the fixture, unhook a ballast and plug it back in

Not sure you'll find a T5HO ballast at a hardware store
Last time I looked they were T5 only

Good luck !

[gregzz4]

Just to rule things out

If you have a multimeter, test the switch
If you don't, swap the switches around and see what happens

And the odds of 4 bulbs burning out at once are probably huge, but ...
I'd be inclined to, one at a time, try the bulbs that are out on the ballast that still works

Just to be 100% sure you need a new ballast

[Skimmer Juice]

swapping bulbs was the first thing I did. So its not the bulbs for sure. Like I said the switch power comes on , just no bulbs light up. Just haveing a hard time finding what ballast I shoud order . But now that you mention it the numbers you pointed out are probably correct so I will assume its the one with the #4 . So i will try that one first.

[gregzz4]

Sounds like a plan, but I can't help ask
Have you tested the switch ?
Just cause it's lit doesn't mean it works

I've been tripped up by all kinds of the stupidest small things at work and have a new respect for Gremlins