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Using uv light?

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weedhart View Drop Down
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Joined: 11 May 2005
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  Quote weedhart Quote  Post ReplyReply Direct Link To This Post Topic: Using uv light?
    Posted: 11 May 2005 at 12:03
I was thinking if i might be able to use a UV lamp to compensate the lack of sunshine. Ireland is not a very sunny country.

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stashman View Drop Down
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  Quote stashman Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2005 at 19:22

Hi Anonymous- read the topic UVB light I started on this forum. Basically not a good idea, just use either flourescents or better still a high pressure sodium and or a metal halide ( MH for vegging, HPS for flowering ).

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BlackVeined View Drop Down
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  Quote BlackVeined Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2005 at 21:58
I think I read somewhere in a book of mel frank THC might occur in cannabis to protect the seeds from UV light. So UV might break down thc, ?
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weedhart View Drop Down
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  Quote weedhart Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2005 at 15:10
when should i start using the lamp?
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Ganja View Drop Down
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  Quote Ganja Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2005 at 13:33

Please don't use a UV lamp for growing weed. It's dangerous for your eyes and skin, and will not improve your grow. UV lamps are not used by any professional growers (of weed or of legal crops), as far as I know.

You can achieve optimal indoor reults using HID lamps. One 600w HPS per 2m/sq (or one 400w HPS per metre) provides excellent illumination for flowering. One 600w HPS per square metre exceeds the the maximum lux needed by flowering cannabis.

If you're using a normal HID lamp or fluorescents, you can put seeedlings under it right away. Maintain a distance of 80cm to 1m between new seedlings and an HID bulb. Fluoros can get much closer to the plants without damaging them.



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Ganja View Drop Down
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  Quote Ganja Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2005 at 13:39

Here's a link to the UV thread started by stashman:

http://forum.sensiseeds.com/forum_posts.asp?TID=424&PN=1

 

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stashman View Drop Down
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  Quote stashman Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2005 at 14:29
Hello again I thought I would clarify the interest in UVB light effecting the potency of cannabis. An interesting link to look at is  http://cannabisculture.com/articles/2696.html  This clarifys what I was saying in my original thread on this subject, obviously more experiments are needed, and using UVB is dangerous if your in the growroom while these particular lights are on. No danger outside of growroom if LIGHT TIGHT, and no danger to you while tending the plants as long as the supplemental UVB lights are off.
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