Question for Platonic Solid 5000k verses 4000K

[smalltown]

Platonic I read on a recent post about the blue light (wavelength) affecting retinas. Unfortunately for me after scouring the web there isn't much info available save for the reference to the original French article.

I thought I would buy the 5000K led lights, but now I am second guessing my decision.

Please correct me if I am wrong.
Today I downloaded the specs. from Bees for 2 led lamps. Both are the same specs. except for the color temperatures: one is 4000K, and the other 5000K. Would the only difference be a perceived difference in brightness? Can I guess that the 5000K appears brighter simply because it has more blue, but maybe more unhealthy?

I did find one other online stat., and am not sure if it's true for all lamps:
4000K lamp 29 % blue light, 3000K 21% blue light, but no listing for 5000K

 

[cybrdyke]

With LED, although the 5000K lamps appear "blue-er" than the 4000K lamps, they both have huge blue wavelength construction. Your question asks if either is better for your eyes. The answer is as long as they're both LED lamps, there wont be any difference.
So, the next question is, are LED's in general bad for your eyes, seeing as they have so much blue wavelength in them? The lighting industry and the medical industry agree that blue lights are detrimental to your body's natural sleep cycles and so they dont recommend unusually long hours under them. But the cycles will easily return to normal if you avoid the artificial lights.
The medical field has thought for a long time that over exposure to blue light might do some retinal damage. I've not seen tons of studies on it. But they did take a close look at the amount of light in common LED lamps and even though it's heavy with blue wavelength, there isn't enough lumens present for it to be detrimental.

If you have known issues, consult your doctor.
Good luck,
CD

 

[Falcon67]

I run 6500K and some people think that's too blue but I'm not seeing it. I think lots of 4000K LED units are too orange and I won't ever buy anything 2700K. There are some 3500K LEDs that are white enough for my taste. In a shop I'd not go any less than 4000K and really consider 5000K a minimum.

 

[PhysicsDude]

If they're true 4000K and 5000K LEDs, you won't be able to tell much of a difference between them. The 5000K will be a little more blue, but they'll both look white. I don't think you can go wrong with either choice, just comes down to personal preference.

All the LEDs I've bought recently have been labeled 4500K and I think they look perfect. I would lean towards 4000K in a house and 5000K in a garage, but that's just me.

 

[American Locomotive]

4100K is pretty white for average household lighting. That's basically typical office light. 5000K is noticeably more white than 4100K.

As far as the amount of "blue light" goes - 4100K and 5000K LED bulbs basically have the same "blue" intensity per given light output. 5000K lights have subdued red/green output to shift the color temperature "hotter". You won't start getting truly subdued blue output until you reach the 2700-3000K range.

 

[AP514]

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[Platonic Solid]

smalltown - Don't be concerned about the small difference of blue wavelength output between 4000K & 5000K. There isn't a real noticeable difference until you hit 3000K and lower. Keep in mind you're exposed to plenty of blue wavelength just by being out in the sun.

I assume you are referencing this recent post of mine:

My personal preference would probably be 4000K, but if that wasn't available going to 5000K would be just fine with me. Exposure to the blue light spectrum has negative effects on melatonin which effects your sleep pattern (circadian rhythm). On the flip side, studies show people feel more awake and energized in 5000K lighting (which coincides with the melatonin blue light exposure research). If you tend to use the garage mostly in the evenings 4000K may support a slightly better nights sleep.

The blue light wavelength is known to cause damage to the eyes retina and may accelerate age-related macular degeneration. Keep in mind that white LEDs are actually blue LEDs with a blend of rare earth phosphors added to make the desired white CCT.

A better way to limit exposure would be to use dimming fixtures.

 

[smalltown]

Platonic yes that post got me thinking. I'm finally close to buying, and am looking at all angles.

 

[Platonic Solid]

Since I'm already freaking people out: Lack of sleep is currently being researched as a potential cause of Alzheimers. Meanwhile hospitals are starting to use the blue wavelength in general lighting to kill germs.

 

[bczygan]

6000K for work areas.

Warmer light for cozy living spaces.

Bill