120v LED vs CFL vs 12v Lamps Results

MEXICOWANDERER wrote:
Gdetrailer,

Thank you for the clarification about operation.

I "assumed" the fluorescent CFLs were flickering. Then that leaves the question - what part of that light tires out my eyesight? Not only do my eyes ache, but my vision gets blurry, even with reading glasses. 26 watt General Electric cool white CFL versus a 30 watt 5K LED chip. It can't be the 4 watts. The lamps occupy the same place.

I always appreciate understanding the why of things...

Artificial light affects everyone differently..

I could not hazard much of a guess other than perhaps eye strain due to glare (LEDs are a lot more directional where CFLs blast light in all directions)..

Could even be a bit of allergy to something or dry eyes which can make your eyes (and you) tired, added to the eye strain..

Now dirt cheap CFLs may not have good filtering of the switching supply which could allow for some strobing but that once again will be way up above 20Khz.

But keep in mind that decent quality 120V LEDs do use a similar approach with a switching power supply.. And White LEDs (most all) use a similar technique to fluorescents by shooting UV into a Phosphor which glows.. There was a few White LEDs in the past which employ RGB LEDS and mix the output to get white (although they are the exception now days).

The difference I can think of is perhaps the UV is in a different part of the UV spectrum and perhaps the LEDs filter out the UV better than fluorescents..