2- A FAN IS NOT NEEDED TO CIRCULATE THE AIR. The super-oxygen molecules reach out from the light bulb to about the distance of 8 feet. Of course, the closer things are to the light the better. Also, the air naturally circulates near and around the bulb. However, a fan might help the process go faster.
"The harmful effects from exposure to ultraviolet (UV) radiation can be classified as acute or chronic. The acute effects of UV-A and UV-B exposure are both short-lived and reversible. These effects include mainly sunburn (or erythema) and tanning (or pigment darkening). The chronic effects of UV exposure can be much more serious, even life threatening, and include premature aging of the skin, suppression of the immune system, damage to the eyes, and skin cancer.
Ultra-violet light is an effective method of sanitation. Ultraviolet lamps are used in sewage treatment plants, hospital clean rooms and many other areas where killing bacteria, viruses and spores is crucial. Ultraviolet light kills cells by damaging their DNA.
The light initiates a reaction between two molecules of thymine, one of the bases that make up DNA. UV light at this wavelength (shortwave UV or UVC) causes adjacent thymine molecules on DNA to dimerize. The resulting thymine dimer is very stable. If enough of these defects accumulate on a microorganism's DNA its replication is inhibited, thereby rendering it harmless. The longer the exposure to UVC light, the more thymine dimers are formed in the DNA. If cellular processes are disrupted because of DNA damage, the cell cannot carry out its normal functions. If the damage is extensive and widespread, the cell will die.
However, ultraviolet light is only able to harm cells that it contacts. Even a small crack can hide spores in its shadow, keeping them safe from the UV. And although UV light is also harmful to people (it damages our DNA too!) - as long as we stay out of direct exposure - it is possibly a better alternative to some of those other nasty chemicals out there."
HIS ARTICLE(s) SHOULD ACTUALLY AND MORE APPROPRIATELY BE TITLED... "WE NEED MORE SUNSHINE & RED LIGHT FOR BETTER HEALTH!!"
Dr. Wunsch is trying to make a name for himself as the anti-artificial light, anti-LED guru. He has a pet theory which he is using to get some publicity... but no real studies to back his theory up. HE COMMONLY TAKES LIGHT SCIENCE AND MIS-APPLIES IT TO WHATEVER HE IS ATTACKING. Again, there have been no studies to back up or prove his theory... because, if he did such studies, they would show that his premise was slanted and possibly false to begin with. Notice also that replies/responses are not allowed on his article...because, some real scientists would show how off his theory is.
Wunsch is catering to the ... "all technology is bad--back to nature"... group and he proposes that we should live an 1800's or earlier lifestyle. We are surprised that Dr. Mercola supports him as much as he does... but, people do a lot of things to get people coming to their website.
In his article(s) Wunsch claims that all artificial lights are bad, we should never use them, we should not use TVs, computers, etc, we should not use any light at night... and that if we need light at night, we should only use candles or at worst incandescent lights. He admits he doesn't do and actually does not live by his own recommendations for others).
In his 2nd article (mostly a repeat of his first article) his title claims that using any LED lights are going to harm us or cause us to go blind. Completely false. And that is actually NOT what the science in his article states. Again, he mis-applies the science to make headlines, or he just makes up the sensational (but false) headline to get attention.
Actually, what the science says in the article is that our bodies and eyes need red light to be healthy. Sunshine is the best source of such light. Which is all true. LED lights (in particular those that produce mostly blue light--which are 6500 K or higher which produce almost exclusively blue light) are not as good as sunlight/or some infrared lights for our overall health. Again true.
His theory that blue LED lights are bad MIGHT POSSIBLY (??) only be true.. IF we NEVER received any sunshine or any infrared light at all and we ONLY had blue LED light to live by. (ie in a cave with only blue light.) Again, only his theory. It would be interesting for a rat/mice study to see if his theory actually was valid or how valid it was. (Notice there isn't one.) In Contrast too and Opposing his theory... there are lots of examples in the real world where the animals don't get any red light... and they are healthy and see well. Bats for example, moles, and other night or ground dwelling animals. Their existence and health would indicate his theory has some flaws in it or is false to begin with.)
What he also fails to mention is LED lights can produce any part of the light spectrum from infrared...to ultraviolet. You can have infrared LED lights or blue LED lights or whatever color/frequency you want. Greenhouses do this all the time. So his headline that all LED lights are bad is false to begin with.
Nevertheless, with this being stated: Our PURE-LIGHT LED lights are FULL SPECTRUM and have red, green as well as some blue frequencies present. That is why plants do so well with them. In the near future, we will be coming out with greenhouse lights where you can actually vary the amount of red/green/blue light you want the LED light to produce.
AND, we are planning to have a new light next year that produces more vitamin d light (more ultra-violet B frequencies and red frequencies)... Which we will actually call a Vitamin D light.
Our simple quest is to seek after and produce the best and healthiest lights we can.