how to up thc and other characteristics ?

HeartlandHank

HeartlandHank

Well-Known Member
Nice Kite... you've been throwing down solid info here on RIU... it's appreciated.

I need to look into what I could do with UV lighting and at what cost.

Kite High said:
Ok, yes here you go
Same mother
Clones for each grow

non-uvb results
http://library.constantcontact.com/download/get/file/1102675987015-267/NM_BD16_12_28_12.pdf

uvb results
http://library.constantcontact.com/download/get/file/1102675987015-283/NM_BD17_2_7_13.pdf

same growth chamber all temps and rh maintained the same as was feed schedule and strength only difference was the addition of 12% arcadia T5 ho 54 watts in place of blue actinic 450 nm peak tubes
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Kite High

Kite High

Well-Known Member
legallyflying said:
Has anyone ever used the mega ray? Awhile back when I was interested in UV I was looking at one and try we're all sold out. They also stated that you needed to call and ask permission to order it...should only be used by proffesionals.

I do reca however a very respected grower on this forum tried a bunch of different bulbs, combos, etc and basically said that given the amount needed, the flouro tubes were not worth it.
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I use the arcadia which are the only fluorescent I tested which do in fact produce enough. I also have Magaray externally ballasts mv zoo bulbs as well as externally ballasted mh zoo bulbs from them. They are used in my personal room overhead to get in down into the plant.
 
Sunbiz1

Sunbiz1

Well-Known Member
Kite High said:
I use the arcadia which are the only fluorescent I tested which do in fact produce enough. I also have Magaray externally ballasts mv zoo bulbs as well as externally ballasted mh zoo bulbs from them. They are used in my personal room overhead to get in down into the plant.
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What about using tanning bed bulbs in place of reptile/zoo?.

Like these:

[video=youtube;NQ-LD773_Dk]http://www.youtube.com/watch?v=NQ-LD773_Dk[/video]
 
Kite High

Kite High

Well-Known Member
Never looked into it as they are quite costly and the where to get a fixture. Also do onto know why UVB they emit
 
Sunbiz1

Sunbiz1

Well-Known Member
Kite High said:
Never looked into it as they are quite costly and the where to get a fixture. Also do onto know why UVB they emit
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See edit, 300 bucks.

I used to have one that was self-ballasted and medium base...lemme do some more homework.

TY for all your input:peace:
 
Mad Hamish

Mad Hamish

Well-Known Member
OK I have to ask this: Isn't it pretty dangerous for your eyes? And I'm concerned about my skin too, family history of melanoma see...

So anybody investigate the 'risk-to-reward' ratio here?

Also, I've been reading about these lamps, I noticed the smaller wattage ones (that don't provide enough to supplement canopy) are there to simulate light conditions at the bottom of a forest, the shady part.

Got me thinking, seeing as I get bud all the way down branches, and nice bud too, when growing outside, and some of those bud sites really are shaded meaning they're mostly getting the UV spectrum, perhaps supplementing the LOWER branches with low-wattage UVB might give a similar result. Anybody tried that? If not I'm going to, cheap enough to try on one or two plants so if it does nothing I wouldn't have wasted too much...
 
Kite High

Kite High

Well-Known Member
Mad Hamish said:
Thanks for that! Yeah unfortunately for me I'll have to import as per usual with most things NICE. Definitely going onto my 'want' list...
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If you are in the UK or Europe scan your area as Arcadia is from UK and they are less costly in Europe. Hope it helps
 
Kite High

Kite High

Well-Known Member
Mad Hamish said:
OK I have to ask this: Isn't it pretty dangerous for your eyes? And I'm concerned about my skin too, family history of melanoma see...

So anybody investigate the 'risk-to-reward' ratio here?

Also, I've been reading about these lamps, I noticed the smaller wattage ones (that don't provide enough to supplement canopy) are there to simulate light conditions at the bottom of a forest, the shady part.

Got me thinking, seeing as I get bud all the way down branches, and nice bud too, when growing outside, and some of those bud sites really are shaded meaning they're mostly getting the UV spectrum, perhaps supplementing the LOWER branches with low-wattage UVB might give a similar result. Anybody tried that? If not I'm going to, cheap enough to try on one or two plants so if it does nothing I wouldn't have wasted too much...
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As long as you are 10 inches or more from the lamp you will be no ore exposed to it than you are outdoors
 
Sunbiz1

Sunbiz1

Well-Known Member
NietzscheKeen said:
Snake oil, lol.
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Perhaps, but I'd love to get my hands on a few of these...problem is they don't make them anymore. This 275W bulb will give the average fair skinned individual a real nasty sunburn in less than 20 minutes. And those bulbs lasted forever, had one for almost a decade til' the ballast finally failed.

http://www.ebay.com/itm/General-Electric-Deluxe-Time-A-Tan-Sunlamp-Sun-Tanner-RSK6A-w-Box-Instructions-/181169426419

I'm one of the fortunate few with a sun room though, so I get year round natural light through non-UV block glass...but doesn't help much in December.:mrgreen:
 
S

shroombilly420

Member
Kite High,

I'm a bit confused. You suggest UVB 400uw/cm2. Is this centimeters squared or cubic meters squared? You recommend Arcadia D3+ T-5 46 Inch 54 Watt *12% Desert UVB found here.

My questions for any person who can help:

1. How do I calculate how many of those lights per square foot of grow space? Their website says the bulb is "Typically 61µW/cm2"

2. How many hours should these UVB lights be supplementing the HPS during light hours? (For example, 2 hours a day, 4 hours a day)

3. What week of flowering should one start UVB supplementing?

4. Should one start with the full "dose" or gradually work up to the number of hours the UVB is on?

5. What socket / fixture / bi-pin lamp holder is compatible with this bulb? (A single socket that is easy to manage is preferred, and preferably something that doesn't require wiring)


thanks in advance. :peace:

 
Mad Hamish

Mad Hamish

Well-Known Member
Sunbiz1 said:
I'm one of the fortunate few with a sun room though, so I get year round natural light through non-UV block glass...but doesn't help much in December.:mrgreen:
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NICE. My old man built several glass 'sunroofs' in his house, massive planters underneath. Outdoor plants thriving indoors in a bug-free environment, pretty spectacular. DEFINITELY going to use the idea someday, if I actually build my own :)
 
Kite High

Kite High

Well-Known Member
shroombilly420 said:
Kite High,

I'm a bit confused. You suggest UVB 400uw/cm2. Is this centimeters squared or cubic meters squared? You recommend Arcadia D3+ T-5 46 Inch 54 Watt *12% Desert UVB found here.
centimeter sqaured
My questions for any person who can help:

1. How do I calculate how many of those lights per square foot of grow space? Their website says the bulb is "Typically 61µW/cm2"

2. How many hours should these UVB lights be supplementing the HPS during light hours? (For example, 2 hours a day, 4 hours a day)

3. What week of flowering should one start UVB supplementing?

4. Should one start with the full "dose" or gradually work up to the number of hours the UVB is on?

5. What socket / fixture / bi-pin lamp holder is compatible with this bulb? (A single socket that is easy to manage is preferred, and preferably something that doesn't require wiring)


thanks in advance. :peace:
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1. According to my uvb meter these lamps produce 300 -400 uw/cm2 at 12-18 inches from the plants.
2. I supplement uvb from sprout to chop on the same timer as the main lighting
3. see above...the sun emits uvb always
4. start out at 300 for indicas and 400 for sativas...maintained til the end
5. these are the T5HO 2 bulb fixtures I use...great pricing, holding up well and externally ballasted..I use four of these 1 fixture in each corner in 5x5x9 height rooms.... http://www.aquatraders.com/48-inch-2x54W-T5-Aquarium-Light-Fixture-p/52123.htm
 
S

shroombilly420

Member
Thanks for the reply. You're the man.

If I understand it correctly, the UVB lamp should be ~12 inches away for indicas, and ~18 inches away for sativas? (As I understand it, the lamps produce more uw/cm2 the greater the distance)
 
1

1blazeking

Member
The uvb study which showed higher thc for uvb treated plants could easily be explained by the dry weight of the sample. The uvb treated plants were drier, so naturally more thc per weight. When the scientists talk about why weed in higher elevations has more thc they immediately go to uvb...but why not thinner air or cooler temps at night? Or...drier air?
 
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