Posted on 07/22/2019 5:27:15 AM PDT by napscoordinator
Monochromatic blue emissions have been implicated in retinal damage. Not enough studies to consider proof positive. That is commonly enitted by LCD/LED computer displays and cool white or daylight LED lamps.
I have Advanced Macular Degeneration occurring, the dry version. Basically, it’s retinal cell death, inexorable and incurable. Yes, I can hope for a stem-cell cure but I’m not holding my breath. I’m old and my warranty has long expired.
You can self-test for the start of AMD. Just print an Amsler grid. If you have the wet version, there are shots to help you.
FWIW, I was an early adopter of LED screens. I have 3 large monitors 24” away, and now I minimize my former hours-per-day exposure. House lighting has been warm white LED (~2300K) for dimmable circuits. I avoid my tablet and kindle for reading, though I will need them for reading at some point.
YMMV. Keep in mind the ‘inverse square’ rule. Radiation amplitude declines by the inverse square of the distance. So that 24” exposure can be reduced significantly by moving the monitors 30” away, for example. And I’ve changed desktops backgrounds from light blue to faggy pink. Too bad there’s nothing to do about web pages other than invert the screen colors.
Once the warm white came out in multiple configurations, I started switching over.
Why is it that even bulbs used in an auto application flicker? That one really puzzles me.
LED flashlights are a major improvement over the old incandescent bulbs too.
PA College of Optometry
LED flashlights are a major improvement over the old incandescent bulbs too.
I have one of those old D-Cell “police style” flashlights that I keep just to show people how LED’s have changed the whole flashlight thing. I use a c-cell LED flashlight from costco that puts out more light than an entire bucket of those old incandescent ones. And it has a beam that is adjustable from very wide flood to pencil beam. I live in a home where I’m surrounded by seven acres of lawn surrounded by forest. I can use that thing to spot things in trees well over a hundred yards away. The old incandescent looks like the light of a matchstick in comparison.
And the batteries last a very long time.
I never had a problem with LEDs. It was the POS CFLs that curdled my milk. Every conventional bulb that fails at our house is replaced by an LED.
I don’t like them. They flicker and haven’t brought down the electric bill at all. Mr. b insists on the bright white ones that make everything look like a factory instead of a cozy home. They also make ground beef the color of hwy cones.
At first I just used them in closets, because they lasted so long.
Reducing Short-Wavelength Blue Light in Dry Eye Patients with Unstable Tear Film Improves Performance on Tests of Visual Acuity Published: April 5, 2016https://doi.org/10.1371/journal.pone.0152936
IT’S A CONSPIRACY, I TELL YA!........................
I had LED lights installed above my dining room table, home to my laptop. They lights gave me headaches, which went away after I had the old-fashioned lights reinstalled. (Thankful they still had them).
Harsh fluorescent lights bother me too.
...
Some of the early LED bulbs had pronounced 60 cycle flicker.
You may not have a problem with the newer ones.
Harsh fluorescent lights bother me too.
'Daylight' fluorescents and 'bright white' LED have a lot of blue in their spectrum, this affects some people adversely. The blue light makes the lights seem harsh, but worse, your body uses blue light to regulate the hormones that control your circadian rhythm, excess blue light in the evening can throw of your sleep/wake cycle.
If you try LED lighting again stick with warmer lamps, they more closely mimic incandescents. Look for the color temperature of 2700K.
Also, consider adding f.lux to your computer and smartphone, this cuts back the blue in the evenings and helps maintain your sleep schedule. I love mine.
See post #73
My LavaLamp collection. I have a dozen. They need the heat.
That and the EasyBake oven...
There are new LEDs on the market that have a lower color temperature, closer to that of incandescents. The early ones were too blue, much like fluorescent tubes.
A car has what — an alternator
It creates ac from its rotation from the fan belt, etc.
Then the car battery is supposed to filter out most of the alternating current (ac). There are rectifiers/diodes with the alternator power source.
What I posted is not my work. My interest originated with neuropharmacology and my school’s work with L’Oréal in development of an in vitro alternative to the Draize Test.
They still haven’t produced a brightness equivalent for 200/250 watt incandescent that have the same form factor.
It’s hard reading by a 100 watt equivalent LED, especially for older eyes.
This, and for some reason, the bulbs that should last thousands of hours only last for about a year, max.
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