T12 Electronic Ballast Resetting Problem

2 replies [Last post]
Mike Trissel's picture
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Joined: 2013-10-18

While most of our lighting needs are serviced by T-8 fixtures, we still have T-12 fixtures in certain areas of our plant. A couple days ago, I had to change out a T-12 ballast, and the bulbs did not light afterward. I got new bulbs, another new ballast, sockets – the works.
Then I discovered that these new electronic ballasts for T-12 - 2 HO tube ballasts, need the power recycled after replacing bulbs, before they will re-light. This is a real nuisance, climbing down out of the ceiling, killing whole rows of lights, etc, just to see if the job is done.
Anybody got a (tested) good part number (without naming brands of course) of an electronic ballast, whose designers had practicality and common sense in their design.
I'm not at the level to take it on my own to order them to T-8 compliance, so I don't need that advice.

mdshunk's picture
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Joined: 2014-03-14

I have not observed what you describe with any brand of electronic T12 ballast, but I almost always use Advance. Not sure what brand you're using.

IrishElectrician's picture
Joined: 2014-03-03

[quote=Mike Trissel] While most of our lighting needs are serviced by T-8 fixtures, we still have T-12 fixtures in certain areas of our plant. A couple days ago, I had to change out a T-12 ballast, and the bulbs did not light afterward. I got new bulbs, another new ballast, sockets; the works.
Then I discovered that these new electronic ballasts for T-12 - 2 HO tube ballasts, need the power recycled after replacing bulbs, before they will re-light.
This is a real nuisance, climbing down out of the ceiling, killing whole rows of lights, etc, just to see if the job is done.
Anybody got a (tested) good part number (without naming brands of course) of an electronic ballast, whose designers had practicality and common sense in their design.
I'm not at the level to take it on my own to order them to T-8 compliance, so I don't need that advice. [/quote]

What they should do is get rid of the anti-flash feature these new ballasts have, once a lamp get's weak at all the ballast anti-flash feature shuts the ballasts down until it's re-lamped, and yes you have to shut the power off to re-set them once the new lamps are in.

I've replaced one of those electronic ballasts with a magnetic type and put the old lamp back and they were fine for more than a year so far.

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