Digest for sci.electronics.repair@googlegroups.com - 3 updates in 1 topic

Tim R <timothy42bach@gmail.com>: Sep 14 03:54AM -0700

I replaced the ballast and fluorescent tubes in a bathroom fixture with LED replacements. I'm gradually doing this to all my fluorescent fixtures as they stop working. I always buy direct wire and rewire, otherwise I'm just waiting for the ballast to fail eventually. But this is my first 18 inch, the others have all been 4 foot. And it was very hard to find an 18 inch LED tube.
 
The Amazon description clearly says to rewire. The instructions with the tubes clearly said to rewire. The tubes say Plug-Play and are from China. So I have rewired, though a bit confused over which was right. They turn on but are very dim, nothing like I expected. I emailed the manufacturer and to my surprise got a reply, that said they are PlugPlay and I should not rewire, and they do not work with all fixtures.
 
Maybe I can learn something. Will Plug and Play fail if direct wired? What is different about the circuitry, and why are some ballasts compatible and others not?
 
I read the Amazon reviews before buying. The negative ones were mostly from people who had not read the instructions and had not rewired.
"Peter W." <peterwieck33@gmail.com>: Sep 14 08:42AM -0700

https://www.lightup.com/led-t8-tube-7w-directdrive-keystone.html?utm_source=googlepepla&utm_medium=adwords&id=1535745912911&gclid=Cj0KCQjw94WZBhDtARIsAKxWG-8BEKh8oxyYgvVPmU8_6ZgBytPMr_0DkBqLEdJWSUgDm2ycuOf_c-kaAoBmEALw_wcB
 
You need ^ That One! At least now.
 
"Plug & Play" is designed to take the strike-voltage for a fluorescent lamp. And without it, it will not light properly. Direct-Wire uses wall-plate voltage.
 
Save the one you have for another use.
 
Peter Wieck
Melrose Park, PA
Tim R <timothy42bach@gmail.com>: Sep 14 09:12AM -0700

On Wednesday, September 14, 2022 at 11:42:42 AM UTC-4, Peter W. wrote:
 
> Save the one you have for another use.
 
> Peter Wieck
> Melrose Park, PA
 
Thanks! I've ordered the correct one and can return the wrong one.
 
I remain curious about the circuit but am happy with the change.
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