**ULTIMATE LED TEST** *GLH Spectra 290* VS *Blackstar 500* VS *Hydro Grow LED 336X*

Endur0xX

Endur0xX

Well-Known Member
ok Kap, we are good..

back to UVB. this thread is on this forum somewhere:


cannawizard said:
:joint: welcome to my ultra voilet (B) guide, im making this new version on the fly :joint:


::::so WTF is UVB? :blsmoke: and how does it affect my mj plants?:::::

*well i like to simply things so, in layman's terms ultra violet (B) is just another spectrum of the sun's light..

*high ultra violet (B) exposure is the reason why we all can't stand under the sun for more than 30mins now..

*some smart scientist stated that cannabis plants react to uvb radiation by producing THC+ (natures way of making natural sunblock:peace:)..

*some non-scientist guy stated that it has been evident in some ninja clinical trials that UVB has a direct link to cannabis potency..

*it has been documented somewheres that mj grown @t higher elevations do produce more potent yields..

*so in theory, supplementing cannabis with UVB would be beneficial since MH-HPS-LED-CFL-etc (all dont have enough UVB output to satify; what cannabis normally would be exposed to in nature)

*recent indoor ninja studies show that genetics also plays a role into how the plant will react to UVB, certain phenos on certain strains have shown a higher tolerance for increased uvb exposure, those certain types combat the increased uvb radiation by 3x THC+/Resin production to protect itself


:hump::hump: :hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump::hump:


::::so how can i put some purple lights in my setup? and is there a manual on how to make my plants glow?:::::


*you can go to your local petshop and pick up some iguana lights that have 5.0/10.0 UVB ..those should be good enough if you just wanna have some UVB in your grow room.. keep those cfls close, barely any heat on them, 7inchs from canopy is good

*for those willing to be a rockstar:hump:, try adding 1-2 of these bad boys in your grow room (Osram UltraVitalux 300 watt OR ReptileUV Zoologist Mega-Ray 60 watt) ..with these i'd play it safe and put them at 2ft from canopy, unless you know what your doing:mrgreen:

*please use common sense and safe practice methods when using the lighting mentioned --well just read the instructions that came with them (seems ppl dont:confused:)

*i'd grab these if your really interested in UVB supplementation..
(www.solarmeter.com / UVB meter.. www.skytronic.co.uk / lux meter.. www.oceanoptics.com / spectrometer..)

*if your wondering exposure times, there is none.. no solid scientific data has been published or mentioned or hinted about how long exposure should be.. if you asked me i'd say try 12hrs on..





::::: this info is all stoner nonsense that shouldnt be taken seriously, ;) ::::::

dedicated to IndoorNinja , the Doc

(i want my original version from overgrow damnit!!)

kiss-ass
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Kaptain Kron

Kaptain Kron

Well-Known Member
It's all good man I know I can be an asshole today especially lol I got the flu my temper isolde in the negative for patience lol ;) no anyone's fault we just got a pmsin kaptain on our hands today lol
 
hippy132

hippy132

Well-Known Member
Well shot my wad, bought another GLH Spectra to go with my 2 180's. I purchased the 290 at less than the cost of the 180. So, real interested in this grow.
 
C

cannabuilding

Active Member
great comparison man, read through the whole thing lols took a while.

Looks like the Blackstar and penetrator are the way to go, but it would be a better option to purchase 2x500watt blackstars then 1xpenetrator.

Peace :)
 
FMCCNate

FMCCNate

Member
They all look wicked but the penetrator and blackstar are still doing the best. Looks like a bit more resin production from the penatrator.
 
maxpesh

maxpesh

Active Member
The reason the Penetrator is starting to go ahead is because of the additional Green leds in there, here is a short passage from the oxford journals as I have pointed this out before.

The literature and our present examinations indicate that the intra-leaf light absorption profile is in most cases steeper than the photosynthetic capacity profile. In strong white light, therefore, the quantum yield of photosynthesis would be lower in the upper chloroplasts, located near the illuminated surface, than that in the lower chloroplasts. Because green light can penetrate further into the leaf than red or blue light, in strong white light, any additional green light absorbed by the lower chloroplasts would increase leaf photosynthesis to a greater extent than would additional red or blue light.

Here is the full article for anyone wanting to kill half an hour
http://pcp.oxfordjournals.org/content/50/4/684.full
 
D

davoswavos

Active Member
I thought trichromes were like sunscreen the plant produces to protect itself I dont think green light is the reason there's more resin I think its just the intensity from the light remember these lights are all at same height for the sake of the experiment even though they would possibly be better off at a different height and that imo is the reason behind the trich production.
 
Beefbisquit

Beefbisquit

Well-Known Member
Kaptain Kron said:
I'll read It but I got a real hard time believing that
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Not that I'm trying to be a dick, but what qualifications do you have to even question an Oxford study in the slightest?
Which part do you find hard to believe? How do you find it hard to believe?
Was it through testing of your own?
Or just because you don't "think" it's true?

It makes perfect sense that green light would have an easier time passing through green leaves than red and blue light. So for penetration of leaves that are further down into the canopy green light is recommended.

Again, not trying to be a dick - I really enjoy your posts!
 
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