On Monday, October 22, 2018 at 6:24:19 PM UTC-4, danny burstein wrote:
In Clare Snyder writes:

Normally LED bulbs do require some re-wiring of the fixture.
You bypass the ballast and supply power at one end.
Wrong.

The LED tubes sold by Home Despot do NOT require rewiring - but they
DO require a functioning ballast. The fixture failed to light the
original tubes because the ballast was weak. Bad tubes can accellerate
ballast failure and bad ballasts can accellerate tube failure.

Don't be so quick.

Home Depot, and the other marketers, sell _two different_ types
of LED drop-in replacement tubes.

One type will, in fact, work with the legacy ballast so doesn't
require rewiring [a].

The others operate off (in this country...) 120VAC.

To use the second type you have to bypass/remove the ballasts
and hook up the 120V wiring directly to the doghouses.

I suspect the original poster got the wrong type...

I guess so, given that he was having problems with the existing one
and wasn't sure of what was wrong. But I can see someone starting
there, instead of pulling the fixture apart to rewire it. Me,
I'd go with a new LED fixture, unless there is some good reason not to.





Someone here pointed out that there was a third type of tube
that somehow or other could be used with both the ballasted
fixtures and the directly wired ones. I've never seen them
but hey, it's possible.

[a] my head hurts visualizing how that can work.


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