Black lights in flower.

[mr burns]

yeah, thats cool but who cares what colour the pistils are?as long as the trichomes are bursting,then he can have his black little hairs,have fun

[Guest BridesNightie]

"Fluorescence screen

 

Bush Doctor (1993) screened marijuana for aflatoxin-producing A. flavus with a UV-A lamp. Contaminated material fluoresces a light green color. This screening method has not been tested by other researchers (Llewellyn & O'Rear 1977)."

 

http://www.stormloader.com/aallon/articles...ntaminants.html

 

 

cheers, BN

[dogsted]

I shine a uv light on my ball bag everynight before bed it increases the potency of , my you know I also use a plasma generator to shock my plants it makes them grow in the shape of an egg.

[Guest]

:: thats funny dogsted

[jackfrost]

Normally UV radiation comes from the heat that the

HID lights produce, but if you are using extremely good air or water cooled lights you can take nearly all the heat away from the plants even when they are only 200mm away from the plant on a 1000watt light.

 

The plant needs a certain percentage of UV heat/radiation light for a stress free healthy life, and if they do not get enough UV light they are prone to certain virus and diesase more easily.

 

What ive found is that where your "air in" duct is, the plants around this area (when using water cooled light) does not get enough uv heat combined with cold air coming in from outside causes problems just in the area of the "air in" duct. - ie plant got streak virus (very rare)

 

Once I installed a uv lamp above this area, i did not ever have any problems again.

 

Jack

[dogsted]

Check out this germicidal uv bulb but dont look at it or shine it on your shine it will make sick and eventually kill you I think. see link

 

http://www.sla.net.au/products/lamps/fluor.../germicidal.htm

[Luke Skywalker]

Normally UV radiation comes from the heat that the

HID lights produce, but if you are using extremely good air or water cooled lights you can take nearly all the heat away from the plants even when they are only 200mm away from the plant on a 1000watt light.

 

The plant needs a certain percentage of UV heat/radiation light for a stress free healthy life, and if they do not get enough UV light they are prone to certain virus and diesase more easily.

 

What ive found is that where your "air in" duct is, the plants around this area (when using water cooled light) does not get enough uv heat combined with cold air coming in from outside causes problems just in the area of the "air in" duct. - ie plant got streak virus (very rare)

 

Once I installed a uv lamp above this area, i did not ever have any problems again.

 

Jack 

 

Firstly, I'd like to point out that Ultra Violet light is not the same as Infra Red, which is what I believe you are talking about Jack. Ultra Violet light doesn't transmit heat energy, IR does. HID lamps put out a large amount of Infra Red, which, when these forms of energy waves hit a substance, be it atoms of air, or plants, or anything, it donates energy to said substance, and this becomes heat. We in turn give off IR radiation ourselves, as we respire and burn energy to live...

 

Ultra Violet energy, however, does not do this. Ultra violet is at the other end of the scale of visible light, like IR, just outside our ability to see... but it has a much higher frequency as a result of this, and has different effects on the bodies which is irradiates. It burns you, true, and it does create some heat energy as a byproduct, but it's a far more insidious and finer damage to the cells of the body which is causing this. As it has a higher frequency, it's able to penetrate cells and interact with them on a finer level, and damage them in different ways. UV is also to some degree misunderstood though, and a lot of our understanding of how plants and animals on earth have put up with this potentially harmful radiation, (thanks ozone layer.... ) is only just beginning to be learned...

 

After doing a little looking on google, apparently MH lamps produce decent amounts of UV radiation, whereas HPS lamps produce little... Enough to make a warning about using MH lamps in areas where you'd expose UV sensitive items to them apparently... like paintings, documents, plastics, humans...

 

But yeah, I think you're a little confused here jack, as you refer to the UV as though it were causing the heating effects of the lamps... That's IR you're thinking of...

 

Oh yeah, and about your virused plant, there is no physical way that cold conditions could give your plants a virus, only an insect or unclean habits in cutting the plants and maintaining them would give that. Do you smoke? This is also a potential vector, as Tobacco Mosaic virus is readily transmitted by hands and fingers when nipping off branches, leaves, mixing media, etc...

 

But yeah, you can't get a cold by being out in freezing weather, and your plants won't get viruses because you have them near the inlet. Unless an insect which carries the virus, (aphids, whitefly, and numerous other sapsucking insects) comes into said inlet and munches on your plants of course.

 

Sorry, but I just had to comment on that, as it was glaring me in the face. Hope you don't think I'm trying to be a smart arse or anything, but what you were saying about UV and viruses just wasn't factual mate. Had to say something, you understand.

 

Some companies use UV lights to sterilise nutrient tanks in large greenhouses, and as I said before, I've heard of them being used to increase potency, but I've never really looked into it. There are dangers involved, like cancer if you're exposed to it too often and various other things like ozone generation, etc... I would be very, very careful if you started sticking UV lamps above your plants, investigating exactly what they do and what potential effects they could have as above...

 

Interesting though...

[jackfrost]

hey luke - i only make a comment of my own experiance. Nothing else to go by. UV lamp fixed my problem, fiction or fact - fucked if i know why it worked. - local hydro shop owner said to use it a few years back - and it worked for me - if anyone else wants to try it that is there own decision, but it helped me.

 

Fact one :- i never had the problem with normal HID and reflector type lighting only when i starting using water cooled lights - (these lights run so cool you can put your plants directly on the outer casing on the light and they will not burn.

 

Fact two:- streak virus is very rare - have only heard of a few cases in australia before.

 

Fact three:- the only plants infected were the ones around the cool air inlet from outside.

 

Fact four:-I got streak virus 6 out of 8 crops in a row only around the cool air inlet. (room 5m X 3m)

 

Fact five:- have installed the UV lamp and have never had it since. - 6 crops later

 

As i said this is what worked for me - as for a scientific reason - im fucked if i know why - if anyone has had experiance with water cooled lights before please i would like to hear from you.

 

Jack