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UVB Light to Increase Potency

Discussion in 'Advanced Marijuana Cultivation' started by Tulane41, Jun 16, 2010.


    Tulane41 Active Member

    So I've been doing some research on UVB light and it's affect on trichome development and potency. It seems that people are pretty much in agreement that UVB increases potency.

    However, I have not seen much in the way of actual usage and safety. I'm wondering if a reptile light would work. It puts out UVB light.

    Another piece of info I have failed to come up with is how many watts and how long to leave the light on.

    I realize UVB is destructive in high doses so I've heard of ppl hitting the plants for 20 mins a day and getting results. Still, I would like to know if anyone has done this and if so, can you give some details. Thanks

    Here are links to what I read:


    TheOrganic likes this.

    homebrewer Well-Known Member

    MH bulbs produce some UV. Some people talk about using a 2:1 HPS:MH ratio in flower with great success.

    If you're looking for a straight up UV bulb, check out http://www.reptileuv.com/

    RichED Well-Known Member

    1/2 half hour or so per at about 1 1/2 foot away from plant wil increase trich production more trich does not ness mean higher thc value

    medeoca genetics pot with a lot of trichs not gona be better then smokin genetics with a few trichs my brother will not change calaber of smoke the gravity of the high will not increase it produces a level of light similer to the sun makes the plant produce trichs like a sun screen repeat will not improve potency oh did i tell you it will not improve potency it will no.......

    why because i love you and i want you to GET IT
    peace im out


    sensisensai Well-Known Member

    Agreed, it will stimulate I higher trichrome production, in turn potentially meaning more flavor, or smell, etc but the potency is a genetic trait encoded in its dna there is nothing short of genetic modification anyone can do to drastically increase thc content. But its increased my hash yields probably .4 grams an ounce if that helps sale ya at all, I give it 3 hours everyday in half hour incriments, I rigged a switch to my doorframe that shuts the light off when the door opens should I need to do something in there while its on. Fairly cheap and easy just don't expose urself and all should be ok.

    Tulane41 Active Member

    Thanks for caring, but I was under the impression that trichomes house THC and the CBDs. Yes, that doesn't mean that the THC content of that resin is high, but it does mean there's more THC than if you hadn't used the UVB. Thus, UVB makes the marijuana more potent. Forgive me if I'm wrong. I'm not trying to be a jerk. I'm just trying to get it right. Here is the beginning of the Cannabis Culture article I cited earlier:


    TheOrganic Well-Known Member

    :blsmoke:I'm def. looking in to this UVB lighting. Subbed Too Hear More Info. I understand how it would produce more trichs it makes sense. But potency is genetics time and time again! It probably helps produce diff. cannabinoids too, To make it to its potential.:twisted:

    ginoSA Active Member

    i got one hanging in my flowering cab right now. :)

    RichED Well-Known Member

    41 did you read what you posted to prove your point

    trichome production is not necessarily an indication of a potent plant.

    this is a cut and past from your post

    homebrewer Well-Known Member

    Potency is 'sealed in genetically' if you're growing the plant to 100% of it's potential. Based on the topics around this forum, I'd guess about 5% of the posters here are actually capable of doing this. If UVB light helps a grower's plant reach it's full potential, there will be an increase in quality (potency).

    SupraSPL Well-Known Member

    I have been using UVB reptile bulbs for about 18 months. I use a timer to turn it on for about 3 hours during the middle part of the day. I have no idea if it increases potency because I have nothing of my own to compare it to. So now I am going to skip the UVB and see what happens.

    I have heard some say that UVB is most effective to mature the trichs during late flowering, but personally I don't like couch lock so maybe I will end up not using it. I have noticed that when my friend grows the exact same cuts under super HPS they seem just as potent and resinous as ever.

    Tulane41 Active Member

    What type of reptile bulb are you using?

    Nickyj420 Active Member

    I did a grow with 9 plants under a 1000 watt dual arc hortilux bulb temps at 68 to 78 i had 4 different strains in the corner of my 9 plants is where i hit my Master Kush plant up with a Zoo high powerd uvb light im a heavy smoker where an 8th to a quarter a day is e-z for me and at the end of the day the master kush uvb was the only one to still get me sooo highh i never smoked it in the morning cause once i was fucked up for close to 4 hrs 3 for sure wasted not off my other 8 plants but they were still good ass weed and i only hit my plant up for 12 hrs a day for like 2 to 3 weeks UVB defenatly does somethen

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