blue light associated with prostate and breast cancer

Years ago in an offset house we used high-cri light bays to assess color. Along came Ott lights and we started using those, as their cri is exemplary. These lights were developed with an eye toward health and are still marketed that way. There have been many studies done on them over the years and I’ll leave it to the individual to poke around and find something to believe, or not. I can’t quantify it, but I feel good around these lights and still use one in my darkroom. If they weren’t so expensive, I would light my whole house with them.

So I’m wondering if the health issues of bluish light are a question of strictly wavelength, or is the quality of the entire spectrum of a particular fixture a factor as well? Schools that install Ottlites have fewer sick days and higher grades, say the studies anyway. These are not led driven, they are gas tube phosphor.

Ott

Indeed NBA has no blue output. Most of its output sits at 590nm like low pressure sodium. PCA, or phosphor converted amber, use YAG phosphors to produce yellow light from blue. There is typically less then 8% blue in such chips.

I got no problems. :slight_smile:

Your anecdotal experiences disprove the decades of studies which also happen to have fairly solid theories for the causation of this effect?

Ehh I did shiftwork in hospitals where the lights were pretty much all 6500k~ or higher and still slept like a baby after shifts within 30~ mins of getting home so did my co-workers hell even during shift we would get sleepy under fluorescent lights….

Also the dailymail is hardly a credible source to cite from as the site itself doesn’t have citations to where their information was pulled from or what study……

The numbers indicated from the article linked don’t even make any sense…. The observation period of 30 days how in the hell did each participant get an average of 38.4 hours indicated is 30 days for sleep and cell phone use then they slap the number each participant had an “average” of 38.4 hours but neglect to indicate which…… if total hours of sleep how in the hell did each participant get an average of 38.4 hours…. were they in a coma ? correct me if I’m wrong but I always thought “Average = Sum/Count”

so…. 38.4 = X/30 thus X = 1152

How in the hell did each participant sleep more hours in 30 days than total number of hours in 30 days…. I mean simple math 24 hours in a day 30 day observation period equals 720 hours….

When very tired (and healthy) you can still sleep, that isn’t a counter to the fact that blue light reduces melatonin production.

That’s 38.4 hours on their phone over the test period. Number of hours each person spent on their phone/number of participants = average hours on phone

Blue Light Deniers… :person_facepalming:

From years of testing, I can confirm I feel a difference in my sleepiness depending on the ambient lighting. It does not mean CW will for sure block a person from falling asleep. I can fall asleep under the afternoon sun laying on the beach. Sunlight emits more blue light than any CW emitter. When I’m tired, I can fall asleep under any lighting condition.

Yep. It’s one of those “we only use ten percent of our brain” or “pitbulls have locking jaws” sort of thing.

Just look at how many studies said that resveratrol in wine helps heart disease. We know now that it does nothing of the sort. Many studies said that bodybuilding programs of the 90s like Cybergenix were “groundbreaking techniques” with “scientific evidence” and “peer-reviewed studies” behind them. Now, bodybuilders joke about how you should throw those in the trash since they are worthless. It was all marketing.

This blue light cult is just built around selling “blue light blocking” glasses on Amazon. Utterly useless.

I know it sounds egotistical of me and anecdotal as all hell, but I can call stuff like this early. It’s BS, they will find.

There’s a lot of studies (and even, iirc, a few documentaries) about blue light being the primary trigger for melatonin/circadian rhythm stuff. I recommend you do some research yourself, it’s quite useful to know how to use to your advantage. For example, 2700K in the bedroom makes sleeping and/or winding down easy. 5000K in the office makes it easier to be alert and productive at work. Etc.

My wife is nursing currently :wink: But I just use my LT1. Doesn’t quite get to 1800K though!!

I’m not up to date on Splenda concerns. I’m not even sure if Aspartame causes cancer, but I do know it sucks. I recall reading (but was unable to find a source just now) that it’s responsible for over half of all complaints about food additives in the United States. I know it tends to give me headaches, and Sucralose (Splenda) or Stevia both taste better (subjective) and fail to give me headaches in my beverages.

We’re getting off-topic here, but…

LMGTFY

https://www.google.com/search?q=blue+light+nurses+study

Infant and elderly people are more susceptible to the sleep-disrupting effect of blue light, though older people have natural lenses that get increasingly yellow with age.

One thing I learned long ago is that if someone wants to eat rat-poison as a sweetener, let him. Arguing about it is useless, both sides will trot out “evidence” of one type or another, he won’t stop eating it, and you’ll only get aggravated trying to convince him otherwise.

Bon appetit!!

These NBA are interesting for this specific use.But CRI would be very low.
Where we can get on 3535 - 5050 size?

Rat poison?

What have you been smoking?

Don't tell me you've been smoking colloidal silver again.

Article that was linked indicates “each participant had an average of 38.4 hours over this period” thus your “Phone hours/ total patients = Average” wouldn’t be the equation that would apply as that would be the average of the observed group, BUT okay lets say it does, the way they presented the information is very deceiving as its the sum total time on the phone during the 30 day observation period of the group not a real average of each participant as indicated.

With this information that would roughly amount to an hour and 20~ minutes daily BUT they also indicated it averaged out to be around 3.7 mins per hour during the day on a say a 16 hour day that would only be 59 minutes on the daily. The average person generally spends more time on a computer for work, watching tv in leisure etc than whats indicated in this article…. One would think the volume of time in front of a monitor or tv is more detrimental than 1~ hour on your phone periodically through out the day…

The Galaxy Note 9,has the same capability as well.

I think that halogen lights emit large quantities of blue light.

Right up into the UV, too.

I still got one of those leak-detecting kits with UV dyes that you can add to oil, coolant, etc. Instead of a UVLED light, there’s a “gun” with 50W halogen bulb behind a silvered-glass filter. Blocks all VIS light and leaves only UV, like a ZWB2 filter.

Of course, I’d use one of my lights vs that beast, but…

this has nothing to do with CRI
you can get red in 660 and 730nm, plus green 520nm and
Amber 595nm all from kaidomain.

and people, please dont reply to the Blue Light Deniers, they are just hijacking the discussion to talk about splenda… dont take the bait.