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PSA Too much light

MarkyJ

MarkyJ

New member
If our plants can burn under the lamps what about our skin? A few days ago my face got red and then pealing including around my eyes even though I had a hat and cheap grow glasses on. I attributed it to my age and cold weather but I never really had cold weather skin before so now I think my lamp could be a factor. I have not looked at my plants since and it healed up already.

I have a viparspectra r900 they say is full spectrum. My first grow was in the summer so my face was tanner and acclamated I suppose and didn’t get a face burn even though I spent a lot more time admiring my plant hahah. I think with the lamp reflection off the tent the light could bounce up to my forehead and eyelids I guess.

Anyway after reading the the PSA I feel like turning off my lamp now when I water my plants. 👌
 
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Try and Water and Foliar feed just after lights out for better absorption and protection. Check before lights on for absorption and run off. Besides the goggles wear long sleeves, a hoody, and gloves when lights are on. Take your plants out of the tent or grow room to train or defoliate until you get the into a Scrog. If you want to work inside the tent in the dark you can wear a green headlamp that won't affect your dark period.

I get UV treatments for psoriasis and the treatment lasts 15 or 20 seconds, 3 times a week till it goes away and the VA is using medical grade lighting not 400, 600, 1000 watt lights. Always leaves a red mark.

There are rumblings that these full spectrum light bulbs will one day be prohibited because of the harmful rays and environmental issues. Just recently read this in a few different places. One guy I believe is Brendan from Spectrum King Yes I know they make LED lights but he is very upfront and transparent.
 
That's funny banning a light for its spectral output.
I have noticed that even cheep clear safey glasses are enough to block harmful uv light i know this from work.
I have also noticed because I shave my head if i am under the 315 cmh for a long time like during stretch when I am scrogging. That it burns my head I use spf 50 baby sunblock at work for uv protection and started putting it on my head it helps.
so if u do have alot of work to do under the lights treat it like the sun protect yourself.
 
So u are saying that the uvb light that come from the 315 cmh does nothing to the human body and it's just a placebo effect brought on by some kind of mental manifestation.
What causes the light burn from my leds if they don't produce any heat.
 
Ok lets clear some things up.

Energy that causes physical damage is typically caused by ionizing radiation. This is the energy that causes destructive damage by liberating electrons from atoms in matter. Non ionizing radiation such as visible light, has wavelengths too long to destabilize electrons. However the non visible light such as ultra violet radiation, has short wavelengths which are ionizing.

Now lets look at lights that contain some of this ionizong radiation (ultra violet).

High pressure sodium actually has very little to no UV radiation. However metal halide has some pretty staggaring levels of UV A that is comparable to sunlight. Ouch!. Whats more surprising is that ceramic metal halide has less UV energy than HPS. I bet that will confuse those who were told otherwise :S. However, they may contain much more dangerous levels of UV C that is typically filtered by our atmosphere. But i have found no evidence so far.

LED has virtually no UV energy to speak of and is very difficult to quantify. Although there is energy from the recombination process. The energy is converted into non ionizing visible light because of the doping process in semiconductors.

As has been suggested already, there is a study that looked at the potential dangers of LED lights. Specifically with the blue spectrum. However, it has been reveiwed as a poor assessment and is misleading. The study protocol applied light intensity equivalent of a 100watt lightbulb at a distance of around 12 inches. Not exactly what one would consider common daily exposure. So as far as other field specialists are concerned, its a non issue and something to forget entirely.

Lastly regarding plant physiological responses to light. Damage to plants caused by oversaturation of light, is caused by photo oxidation to pigments and membranes. Ultimately destroying chrolophylls and making leaves loose the green color and present bleached.

I got a blanket for christmas ;p
 
The LED author got into some fanatical stuff at the end of his article, even though I felt he was a little off kilter I still learned a lot I didn't know.
 
Id be careful of what you take from that article, a lot of what is stated is misleading and wrong. I got queasy reading it.

Always good if something is learned though ;)
 
It must be noted that LED fixtures can come with UV diodes, this is conditional however and is only applicable where special and expensive doping is used to allow this.
 
Common sense tells you not to look at some lights, just like your not supposed to look at the sun for long. My led came with a warning not to look at it to long. It can't be good to look at it long. But there is always going to be a few who know differently. I think those that continue to look at the brite lights are called pushing the envelope, and trend setters, until they are blind. Then they are called something else.lol.
 
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