The intensity is important, too. One of the main studies I’ve found on the effects of light of different CCT’s (where higher CCT’s have more blue present) on melatonin suppression was conducted in a room lit to 200 lux.
That’s not necessarily easy to compare to a flashlight beam where the illumination around you will be uneven, but I think it’s safe to say we’re talking about several hundred lumens of illumination up close, and significantly more further away to cause equivalent melatonin suppression to cause comparable levels of suppression.
I have an observation that the modern imbalance of omega 6 to omega 3 (ideally, 1:1) (the well known, by the food chemist’s who are highered by food processing industry, hne byproduct is very bad, especially) will replace the body natural lipid balance, allowing unstable oxidation (leading to atherosclerosis), skin cancer, premature skin aging. Likewise, susceptibility to daylight that our ancestors, before 10,000 years ago would not have been affected by. It does not help that in the last 100 years, formerly industrial oils have become partially hydrogenated to allow some semblance of ediblibilty and stability.
So, take this near sighted article with a gram of fish oil to balance out your modern overdose of “heart healthy” hydrogenated omega 6 vegetable oils.
I am rather unhappy with the whole flashaholic community who taught the police how to build low profile light racks. Life was easier in the days when police drove around, roofs adorned with easy to spot, and yummy looking, bubble gumball machines. (Also, I heard they drove at night, slightly lit, by a pilot light, in my parent’s day. )
This library service gives access to a lot of scientific discussion and research papers, and helps people find relevant work.
You can download one at a time free.
At least in Connecticut, I’ve seen troopers just cruising with a steady red light on top. There’s a name for that but I forgot what it is (and I’m still trying to find out).
I thought from vague recollection it may have been “California light”, but searches turned up nothing of interest. Must be something else…
Best I could find was “cruise lights”, but I was (mis?)remembering a location associated with the term.
“But the new study, published in Current Biology and led by Dr. Tim Brown, suggests that it’s more natural to look at blue light in the evening and warm light during the day. That may be because natural light is actually bluer during twilight.”
my sunsets look orange, not blue… imo there is more blue during the day
next they show that blue light helps mice sleep better
“The team of researchers used specially designed lighting on mice in order to test how different wavelengths affected sleep patterns. Blue light proved less disruptive to mice’s sleep than yellow light of the same brightness, according to the researchers.”
but wait, mice are nocturnal.
They want to sleep during the (blue light) day. At night, when mice are active, it makes sense that warm light would help them stay awake.
so yes
for a mouse, blue light is associated with sleeping
for a human
blue light is associated with activity during the day
at night blue light interferes with sleep, in humans… maybe not in nocturnal creatures, like some patrol cars… lol
Sarcasm not needed,
It’s a fact that Blue light can be dangerous for Retina,that depends about intensity and concentration of the emission
Much important is the assuefation that people have for the artificial light.
You will want an ever stronger light
oh wait
—
assuefa*c*tion
assuefaction (ˌæswɪˈfækʃən)
n
the condition of being or becoming familiar with or used to something
—
merriam webster also says it is obsolete
come on - obsolete word, plus mis-spelled - - did anyone else know that?