[TVI-RFI-EMI] CFL RFI warning sticker

Andy ingraham.ma.ultranet at rcn.com
Wed May 27 12:44:59 EDT 2009


> Worse yet are the "equivelent" LED bulbs.

I spotted, and was tempted by, a 40W-equivalent LED bulb at my last visit to
the hardware store.  Didn't have time to look closer.

Thanks for your mini-review.  My guess is it has a somewhat focused or
directed beam and it is "40W" equivalent only in that beam, not in overall
light output.  Is that what you observed?

I think there's no particular reason why the LEDs would not make RFI as
well, since they all need some sort of current limited supply and they
probably don't use a linear one.  Kind of like the auto taillights that
"come alive" when you move your eyes, which I am told generate a lot of RF
hash on the lower frequencies.

The GFL with the RFI sticker was a Sylvania dimmable flood.  The other GE or
Sylvania non-dimmable CFLs I've got did not have the sticker, and they have
not been noisy in my experience.

Andy




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