Author Topic: Is this safe to do?  (Read 262 times)
axel_chai
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Is this safe to do? « on: August 30, 2025, 10:36:29 AM » Author: axel_chai
Hey guys, it's been a while since I logged onto this webstie.
So, I'm currently attempting to mend my old table lamp. The ballasts in there don't sound good anymore, anyways that's what the main problem is. The fixture came with two 10W 110V ballasts, while the mains in my country (Indonesia) is 220V. I bought a 10W 220V ballast, it doesn't fit in the fixture, so, should I buy two more 10W 110V ballasts? I still can find them somewhere though, but is it safe to do? Wire them in series?
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Re: Is this safe to do? « Reply #1 on: August 30, 2025, 10:44:44 AM » Author: Multisubject
Wire it as two independent 120v lamps, then wire those in series. Still only two 120v ballasts. I can draw a simple diagram if you would like.
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axel_chai
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Re: Is this safe to do? « Reply #2 on: August 30, 2025, 10:52:11 AM » Author: axel_chai
Thanks for replying,
Could you draw the diagram, please?
Thank you very much.
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Re: Is this safe to do? « Reply #3 on: August 30, 2025, 11:46:05 AM » Author: Multisubject
Like this:
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axel_chai
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Re: Is this safe to do? « Reply #4 on: August 30, 2025, 11:51:02 AM » Author: axel_chai
So do I need two lamps?
Because the fixture only can fit one tube.
Thank you.

Update :
Here you can see the fixture : https://www.lighting-gallery.net/gallery/displayimage.php?pos=-237750
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Re: Is this safe to do? « Reply #5 on: August 30, 2025, 12:43:03 PM » Author: Multisubject
Wait, so the fixture has two ballast but only one lamp? That is very odd. If you know how it was hooked up before it is probably fine to just put it back how it was but with new ballasts.
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axel_chai
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Re: Is this safe to do? « Reply #6 on: August 30, 2025, 09:03:10 PM » Author: axel_chai
Alright, thank you so much for helping me!!
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Re: Is this safe to do? « Reply #7 on: August 31, 2025, 03:25:40 AM » Author: RRK
You can also use 220V ballast in a suitable external box somewhere on the power cord. My usual advice is as always when in doubt you should use a true RMS multimeter to check tube current you are getting. Asian 10W tubes are 0.22A (if I remember right, please check).

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