blue light associated with prostate and breast cancer

great info!

I think brightness also plays a role. Low lumens means less of whatever percent of blue light might be coming out of an LED.

it would help to have data on the percent of blue light in various LED options at each step in CCT
iow 4000k probably has more blue light percentage than 3000k…

another factor in blue light reception, is the brightness at which the light is used

even a cool white LED, used at sublumen levels, moreso at scotopic levels (below 0.01 lumens, when we cant see colors), would be producing blue light in very low quantities…

makes me wonder if below a certain lumen level, even cool white can be used without degrading Rhodopsin…, and also without degrading Melatonin?

blue light factors to quantify
intensity (more lumens means more blue light)
spectrum (higher Color Temperature means more blue light)

reactions to monitor
Rhodopsin (more blue light means less of that hormone)
Melatonin (more blue light means less of that hormone)

.

What benefits make some people want Amber?
We know Red is better at preserving Rhodopsin and Melatonin.

Cant speak on the sleeping habit’s of co-workers but I get a solid 7-8 hours of sleep on the daily.

Keywords “could” and “can”. I mean there is extensive data and studies connecting the relationship between radiation and cancer is well documented, exposure to radioactivity/radioactive materials increases your chance of developing cancer. Bananas contain potassium-40 which is a radioactive isotope, which technically makes them radioactive…… Brazil nuts are technically in a sense a “super food” and have many health benefits yet contains selenium and radium isotopes which can lead to symptoms much like radiation poisoning….

Still the “Focus” of the study in it of itself is flawed in my opinion…. based on just the RAW total time in front of a “phone” is only about an hour a day~ given if their numbers are accurate, that is far FAR less than the average exposure to “blue light” in front of a TV or monitor for 5-10 times the amount of time daily with a phone due to job obligations OR leisure time…. you can’t really be pushing the narrative that around an hour of phone use daily/3.7 minutes per hour during the day would have affects far exceeding 5-10 hours “blue light exposure from a TV/monitor….

Sure, I know E21A at 2000k are miles better but are hard to find,maybe demand is too low(bad).I would see them on my street Lights…

Can you give me some peer reviewed resources that say that exposing yourself to large amounts of blue-rich white light at night has no negative impact on melatonin and leptin? Otherwise, this is pedantic…

You’re free to your opinions and experiences, but I still want peer reviewed research.

Intl-outdoor has them in the KR-4 and D4 series as a recently added option. Sofirn is also working on another 2000K E21A light. Regarding street lighting, manufacturers are taking note of the increased demand for warmer toned lights. Schreder Lighting now officially lists 2200K as an option for its street lights which are typically listed under color codes. 2200K would be represented as 722 for 70 CRI 2200K or as 822 for 80 CRI 2200K. They also have amber options as well as 727, 827, and even an 825. U.S. manufacturers are practically falling behind.

Guessing reading and comprehension isn’t in your wheelhouse…. I never made claim of such that “large amounts of blue-rich white light at night has no negative impact on melatonin and leptin” I made claim that the volume of it from “Smartphones” is merely a drop in the bucket so to speak in terms of the VOLUME of exposure from TV’s and monitors from a computer and the total TIME of exposure from other sources DWARF the amount indicated in the “study” only mentioning the “smartphone” being the cause is flawed as it was exaggerating the affects while ignoring the fact that screen exposure from “smartphones” in general is smaller than other sources of blue light. But I guess reading my rebuttal and comprehending it are two entirely different concepts to you.

You want “peer reviewed research” that exposure to radioactivity/radioactive materials increases your chance of developing cancer ? there are thousands upon thousands of studies that prove this…. Most famous is madame Marie Curie whom died due to prolonged exposure to radioactivity causing her to develop aplastic anemia which can later develop into leukemia.

From personal experience another aspect is the size of the source,.
The LED emits light from a tiny small area, annoying to watch direct the die at 0.1lm,
while looking at a 60W LPS sodium lamp with a large surface does not bother me at all.
The problem of Leds It is that they spread too quickly on the world,often low quality or badly raw installed with the dies not covered with diffuser( look at gardens lights or some public street).Major of peoples buy them without knowing specs or quality like us.
While a bulb incandescence will always be the same whoever does it, at worst it burns out first

Souichirou!
stop trolling, insulting, hijacking, and arguing

cetary, I appreciate your rational comment
however
it is wasted on argumentative trolls…
so
please STOP responding, and especially requoting, their disruptive posts

Amen. Remember, if someone goes back and removes his/her trolling posts, leaving quoted copies of them around is not helpful.

You can look this stuff up.

Chronobiol Int
2019 Feb;36(2):151-170.
doi: 10.1080/07420528.2018.1527773. Epub 2018 Oct 12.

Systematic review of light exposure impact on human circadian rhythm

This is interesting, know the amount of blue light at different power/brightness levels from the same or others Leds and CCT

I’m not sure “lumens” is a good measure for this topic. After all, UV is zero lumens but damages your eyes.

It may be the brightness of the LED, I’m convinced (if this is anything). If that is the case, WE ARE ALL SCREWED…but we ain’t changin’ a thang!!!

another Denier Post :person_facepalming:

watch, now he will answer and continue the denial

total hijacker :confounded:

nothing on topic to contribute

Deny, Justify, Deny… = troll

There are just some sacrifices that modern life does not allow us to make. And nothing we can do can offset “light cancer” if indeed it is a thing (e. g. we aren’t going to stop driving due to accidents).

Wrong. Switching to luminaries that don’t suppress melatonin is an obvious way to reduce the impact.

Google wants to be your friend, you know.

“we can’t do anything about…” means just “it’s the way it always was - never change a running system”. Kind of ok from some point of view, but imo we must continuously seek the best solutions. We’re clever humans.

Yes, we are intelligent humans.But we are also 8 billion and some greedy and destructive, where the only goal is accumulate profit.Looking how the pluvial forest has been reduced and the pollution of water,air,earth with this stupid consumerist system and globalizzation
I’m not so optimistic

Nope. How are you going to get everyone else to not use, say, LED headlights on their vehicles? How about indoor lighting, more “cancer lighting?” You can’t do it, even if you give up your angry blue throwers. You see?

I can see aftermarket “blue-blocker” filters becoming available to slip over indoor lights, etc.

Would glasses with red lenses count as a good filter?

or is it the other way, you want Blue lense to filter blue light?