THD In Light Bulbs


I have replaced a 40w incandescent light bulb with a 12w LED light bulb. The new LED is way brighter. In fact, the box says that it's a 75w equivalent. The box also shows something interesting:

Power Factor >.90  
THD: <35%

I've read that LEDs are essentially diodes. How does this affect noise in the mains? Do LEDs inject more, less, or the same amount of THD into the mains as incandescent/fluorescent lights? 
c_avila1
audiozenology"That is a link to a highly technical article, that is itself really only applicable to one IC / control architecture. Most EEs would not understand the subtleties of it"


It’s much more science-based, factual, and authoritative than sites such as wikpedia and it’s level of math is well within that which a real EE could understand it’s not fair to dismiss with "a wave of the hand" real science just because it might confuse some and even you perhaps!
It would be within the realm of an EE if they had the experience and knowledge on the topic. EE is a big area and most EE's would not have the specific knowledge in the area for this article to be of much use without some extensive studying. Heck many EEs who work in this area do not understand what's discussed very well.   I am very qualified to make that statement. You are not. It's not really appropriate to the ops question as it only deals with one particular implementation that could be one of numerous used in a bulb and says little about PF and THD of actual LED bulbs. 


Again, if you are going to troll me, which you are obviously doing as you respond almost every post I make in new threads, then you need to step up your technical game.
My biggest concern is that LEDs may inject more noise into the AC line than incandescent light bulbs. If that's the case then I'll continue to use incandescent bulbs. Also, I've recently installed Akiko Audio and Perfect Path Technology products in my system that helped clean up noise in my AC. It's important not to counteract their effects. 
Summary:

  • If you have no dimmer on the line, then the incandescent bulb will inject less noise.
  • If you have a dimmer on the line, but the dimmer is on full, the LED will likely inject more noise. It will depend on the dimmer and LED bulb.
  • If you have a dimmer on the line, but the dimmer is not on full, the LED bulb will inject more high frequency noise, but the incandescent bulb will inject more low frequency noise (as it will be drawing 5-6x the power). I can't comment on how your specific equipment will behave.

Unfortunately there are no absolutes, but this is about as good a guideline as can be given.
Thank you @audiozenology. That summary was all I needed.

 My television and computer monitor are full of LEDs...oh well.