"diodes...that we have never had with any other light source" is basically true except the 1st PAR halogen bulbs (PAR20 and 30) did have a diode.
If you are saying the degree of flicker is different in the LED bulbs over the afore mentioned, pardon me.
The 1st PAR bulbs could not be dimmed with an incandescent dimmer because of this. You had to use an inductive dimmer (ceiling fan or low voltage dimmer). If I recall, this was the Sylvania brand but GE did not have the diode.
On 1/17/2013 7:23 AM, Dale S wrote:
I suppose I could hook up a photo diode and my oscilloscope to find out if there is a "flicker rate" that bugs don't like, but LED's being diodes to start with will have an instant flicker rate that we have never had with any other light source. However since this would be at either 60 or 120 hertz it is beyond the persistence of the eye and would appear to us to be a steady light, much the same as moves and video are. Without cutting one apart to find out, I suspect there is a small bridge rectifier and dropping resister in the base of each one, other wise they would need to daisy chain them in multiples much like Christmas lights as the normal DC voltage drop across a diode is less than 2 volts.
Dale in the Flatlands.
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