• Home
  • Forums
  • Medical Cannabis Cultivation
  • Growroom Design & Setup
  • L.E.D Grow Lights
  • When To Uvb

When To Uvb

  • Thread starter Thread starter Dr kabuki
  • Start date Start date Nov 29, 2017
  • Tagged users Tagged users None

When To Uvb

Dr kabuki Nov 29, 2017 71 Replies 47,429 Views
Page 3 of 4 · Replies 41–60 of 72
Prev
  • 1
  • 2
  • 3
  • 4
Next
First Prev 3 of 4 Next Last
N

Newber

Posts
838
Reactions
1,340
Joined
May 1, 2017
Points
143
Apr 16, 2020
#41
I dont know who is right! ...but I'm high and am learning about uvb and uvc lol
 
Reactions: Beadlesprout69 and Moshmen
Quote Reply

MIMedGrower

Posts
17,190
Reactions
53,530
Joined
Feb 17, 2017
Points
438
Apr 16, 2020
#42
Burned Haze said:
I called the company , it was just a brain fart ( should of looked up their info )

That led it has UV A , trich booster
Click to expand...


only uvb is proven to increase thc. Uva benefits are still being studied.
 
Reactions: visajoe1 and Burned Haze
Quote Reply
B

Burned Haze

Guest
Apr 16, 2020
#43
MIMedGrower said:
only uvb is proven to increase thc. Uva benefits are still being studied.
Click to expand...

But what I mean is if you fill your spectrum with a better “ gap” (. Y the spectrum gap ) it will proven increase your yields , make your results better zexp for watts vs watts on your main bulb

hints why using just white lights vs white and Emerson & uv a ( way better bud and that’s only 12 more watts )

thats why almost main company use deep red like fluence is using vs just one spectrum

—-

i won’t confirm on if something “ works “ intill at least 3-4 times ran, but man even after 48-72 hours those uvb plants you could tell def reacted to them and they def noticed it, very strong light
 
Last edited by a moderator: Apr 16, 2020
Reactions: shaganja and MIMedGrower
Quote Reply

MIMedGrower

Posts
17,190
Reactions
53,530
Joined
Feb 17, 2017
Points
438
Apr 16, 2020
#44
Burned Haze said:
But what I mean is if you fill your spectrum with a better “ gap” (. Y the spectrum gap ) it will proven increase your yields , make your results better zexp for watts vs watts on your main bulb

hints why using just white lights vs white and Emerson & uv a ( way better bud and that’s only 12 more watts )

thats why almost main company use deep red like fluence is using vs just one spectrum

—-

i won’t confirm on if something “ works “ intill at least 3-4 times ran, but man even after 48-72 hours those uvb plants you could tell def reacted to them and they def noticed it, very strong light
Click to expand...


Its the far red that is proven increase growth.
 
Quote Reply
N

Newber

Posts
838
Reactions
1,340
Joined
May 1, 2017
Points
143
Apr 16, 2020
#45
so should u not add UV to a flower room full of hps or cmh since those bulbs produce it already?
 
Reactions: MIMedGrower
Quote Reply

MIMedGrower

Posts
17,190
Reactions
53,530
Joined
Feb 17, 2017
Points
438
Apr 16, 2020
#46
Newber said:
so should u not add UV to a flower room full of hps or cmh since those bulbs produce it already?
Click to expand...

Cmh has some uva and uvb but hps does not.
 
Reactions: Beadlesprout69, Jimster and Newber
Quote Reply
N

Newber

Posts
838
Reactions
1,340
Joined
May 1, 2017
Points
143
Apr 16, 2020
#47
well HOT-DAMN I'm in luck thanks!
 
Reactions: Beadlesprout69
Quote Reply

Jimster

Supporter
Posts
2,770
Reactions
5,578
Joined
Sep 5, 2018
Points
263
Apr 16, 2020
#48
MIMedGrower said:
Cmh has some uva and uvb but hps does not.
Click to expand...
UVA is not usually filtered out by most glass, like window glass and car windows. It ages the skin but doesn't elicit the tanning process, which UVB does. UVB is filtered out by most glass, so quartz glass is used instead, which allows the transmission of the UVB component. Some bulb makers claim to use special glass (low iron) which allows more of it to pass, so I guess there is some validity that the finishing 10K bulbd do give off more UVB. I am going to alternate a 10K and a HPS this flowering session to see how it works out. According to all of the hype, I should get better growth from the HPS and higher THC from the 10K/UVB. I wonder how a 10K finishing bulb compares to a CMH in terms of UVB?
 
Reactions: Beadlesprout69, goingtoguano and MIMedGrower
Quote Reply
B

Burned Haze

Guest
Apr 16, 2020
#49
MIMedGrower said:
Its the far red that is proven increase growth.
Click to expand...
Just because one test says that, does not mean they are correct. I’m seeing multiple viewpoints (not saying your wrong )

Goodbye from Maximum Yield

In print and online, Maximum Yield is your source for cannabis and cultivation knowledge, with informative grow articles and tips to enhance your life with mmj.
www.maximumyield.com

a big issue I could see with a “always on” uva/uvb light with your light like a cmh is (vs a led or not integrated ), you really should be using your light at a selected time and amount of time, not the whole 12/12hr and whole cycle.
 
Last edited by a moderator: Apr 16, 2020
Reactions: shaganja and MIMedGrower
Quote Reply

MIMedGrower

Posts
17,190
Reactions
53,530
Joined
Feb 17, 2017
Points
438
Apr 16, 2020
#50
Burned Haze said:
Just because one test says that, does not mean they are correct. I’m seeing multiple viewpoints (not saying your wrong )

Goodbye from Maximum Yield

In print and online, Maximum Yield is your source for cannabis and cultivation knowledge, with informative grow articles and tips to enhance your life with mmj.
www.maximumyield.com

a big issue I could see with a “always on” uva/uvb light with your light like a cmh is (vs a led or not integrated ), you really should be using your light at a selected time and amount of time, not the whole 12/12hr and whole cycle.
Click to expand...


Look up Bruce bugby at the university of utah. He and his students have been studying lights, nutes and environment in grow labs for many years. Now they have a hemp testing lab and are working direct with medical growers. Also the university of michigan has been testing grow lights for years and there is a lot of info posted.

The sites you posted are there to sell products.

The info is out there. But it is convoluted by retail companies and their advertising sources.

And i would never make a decision based on one test.

Also i totally agree with your point about making gains. A better spectrum does not make more of a difference than good gardening practices, keeping plants healthy and keeping a stable hospitable environment. Need to be dialed in to take advantage of any extras. I will say that these new spectrums with more balanced blue sure seem to keep plants green and healthy better than hps. I have only cmh to compare so far myself though. But you can see all the nice leafy healthy plants online under the boards and such.
 
Reactions: Beadlesprout69 and Burned Haze
Quote Reply

MIMedGrower

Posts
17,190
Reactions
53,530
Joined
Feb 17, 2017
Points
438
Apr 16, 2020
#51
Jimster said:
UVA is not usually filtered out by most glass, like window glass and car windows. It ages the skin but doesn't elicit the tanning process, which UVB does. UVB is filtered out by most glass, so quartz glass is used instead, which allows the transmission of the UVB component. Some bulb makers claim to use special glass (low iron) which allows more of it to pass, so I guess there is some validity that the finishing 10K bulbd do give off more UVB. I am going to alternate a 10K and a HPS this flowering session to see how it works out. According to all of the hype, I should get better growth from the HPS and higher THC from the 10K/UVB. I wonder how a 10K finishing bulb compares to a CMH in terms of UVB?
Click to expand...


Good question. I dont know the percentages. But cmh was desifned to closely mimic sunlight and the finishing bulb to bring out more trichs so I imagine the 10k has more uvb.
 
Reactions: Burned Haze
Quote Reply

Animal Chin

Supporter
Posts
1,451
Reactions
3,353
Joined
Aug 17, 2012
Points
263
Apr 16, 2020
#52
I use a pair of programmable California Lightworks LED and a 315 watt CMH in my room. For the last two weeks of a grow for maybe the past 6 or so grows I've done using the 3 light combo, I dial the LED down on red while keeping blue and white at max output and I change the CMH lamp out for a 10,000k finisher.

I still cannot tell for certain if it increases trichs as in yesterday there was x amount covering this area and today there's x amount more in that same area but it sure does make my ladies stink more and they seem to get saturated in oil more so than when they finished up under a balanced spectrum and a 3100k CMH so the finishing spectra has become part of my routine.

After about a week under the finishing spectrum they can smell so funky skunky sweet loud I'll gag like I'm smelling death and cant even be in the room for more than a few minutes. Then harvest time is just gross with loud aroma.

Prior to using finishing spectrums the harvests were good and stinky but the smell never made me wanna throw up.
I'm also fairly certain this practice is increasing my yields of rosin by a good percentage as my squishin' sessions can yield up to 7 grams for every oz of flower squished and prior I was lucky to get over 4g.

After about 90-100 days of cure the weed is just ruthless potent. I'm tolerant to it but others not so much so they back off the joint after just a few hits. It's kinda cool seeing some weed you grow knock another heavy smoker stoners dick in the dirt
 
Reactions: Bennyjoe, TopShelfTrees, shaganja and 4 others
Quote Reply

shaganja

Posts
1,779
Reactions
4,380
Joined
Jan 7, 2019
Points
263
Apr 16, 2020
#53
during last month of veg, i use agromax uva, and eyehortilux power veg uva. these are t5 bulbs. i use these during the last month of veg. to get them ready for uvb, when flower happens.when i first started using these, i didnt have uva bulbs, and just switched to uvb for flower, and they seem to shock a little. leaves curl a bit, like the bulb is too close. but when i use the uva's first, they seem to make the plant a little sturdier, and they seem to transition better. no leaf curl. am trying to simulate the light intensity increasing as you get further into "summer". if that makes sense.
 
Reactions: Burned Haze
Quote Reply

Jimster

Supporter
Posts
2,770
Reactions
5,578
Joined
Sep 5, 2018
Points
263
Apr 17, 2020
#54
I vegged un
MIMedGrower said:
Good question. I dont know the percentages. But cmh was desifned to closely mimic sunlight and the finishing bulb to bring out more trichs so I imagine the 10k has more uvb.
Click to expand...
der a 3200K and a 7200K 1000w MH, and for flowering I have a 1000w HPS and the 10K finishing bulb. I plan to swap them back and forth to try to get the benefits from both. I have seen the advantages of HPS during flowering, and I usually use a 3200K MH with the HPS, but I'm hoping the use of the 10K with the increased UVB helps things. I have 5 strains going currently, so it's going to be hard to say which benefitted most.
 
Reactions: shaganja and MIMedGrower
Quote Reply

MIMedGrower

Posts
17,190
Reactions
53,530
Joined
Feb 17, 2017
Points
438
Apr 17, 2020
#55
Jimster said:
I vegged un

der a 3200K and a 7200K 1000w MH, and for flowering I have a 1000w HPS and the 10K finishing bulb. I plan to swap them back and forth to try to get the benefits from both. I have seen the advantages of HPS during flowering, and I usually use a 3200K MH with the HPS, but I'm hoping the use of the 10K with the increased UVB helps things. I have 5 strains going currently, so it's going to be hard to say which benefitted most.
Click to expand...


Its funny. I compared and combined all my bulbs on known clones one year. I had horti. Super hps 600w, blue 400w, blue 600w (really a conversion bulb) and a phillips 3100k cmh 315w.

There are definite benefits, negatives and clear differences depending on spectrum but after all said and done i keep going back to 2 600w super hps. I have learned to back off the hps during ripening which seems to help keep the buds frostier.
 
Reactions: Beadlesprout69
Quote Reply

Beadlesprout69

Posts
101
Reactions
106
Joined
Mar 23, 2020
Points
43
Apr 17, 2020
#56
shaganja said:
More good news about uvb. Not only does it stress your plant in the good way, it also is so strong, powdery mildew can't survive, and neither can mites, nymph, aphids, etc...I grow from seed, and never had bugs. But my buddy had a triangle kush cut, and I can't say no to holding such an iconic strain. Well, I've never had bugs before. Heard of mites etc...but never had to deal with them. Well, the kush was thick by the time I noticed, and researched em. Spider mites. Ding! Ding! Found it! It spread to a plant I put in the flower room for seed. So it was in the flower room too! Omg....So by now its been in the flower room for a week!! But I didn't realize my uv lights were already taking care of the problem. I scoped the plant, and there are zero bugs alive!!! Nobody is moving!!! There is a couple videos on YouTube showing spider mites dying from a uv light. It took ten minutes. All dead!! No survivors!!! I put another light in my veg room to take care of those. Will update on how those turn out. I have a feeling there is a mite massacre happening in my veg room!!
Click to expand...

Very interesting to know, do you run uvb during the full lights in period?
 
Quote Reply

shaganja

Posts
1,779
Reactions
4,380
Joined
Jan 7, 2019
Points
263
Apr 17, 2020
#57
shaganja said:
More good news about uvb. Not only does it stress your plant in the good way, it also is so strong, powdery mildew can't survive, and neither can mites, nymph, aphids, etc...I grow from seed, and never had bugs. But my buddy had a triangle kush cut, and I can't say no to holding such an iconic strain. Well, I've never had bugs before. Heard of mites etc...but never had to deal with them. Well, the kush was thick by the time I noticed, and researched em. Spider mites. Ding! Ding! Found it! It spread to a plant I put in the flower room for seed. So it was in the flower room too! Omg....So by now its been in the flower room for a week!! But I didn't realize my uv lights were already taking care of the problem. I scoped the plant, and there are zero bugs alive!!! Nobody is moving!!! There is a couple videos on YouTube showing spider mites dying from a uv light. It took ten minutes. All dead!! No survivors!!! I put another light in my veg room to take care of those. Will update on how those turn out. I have a feeling there is a mite massacre happening in my veg room!!
Click to expand...
When the lights are strong enough to wilt a leaf, why would bugs be immune?
 
Quote Reply

shaganja

Posts
1,779
Reactions
4,380
Joined
Jan 7, 2019
Points
263
Apr 17, 2020
#58
Beadlesprout69 said:
Very interesting to know, do you run uvb during the full lights in period?
Click to expand...
No. Only four hours. Right in the middle of the day
 
Quote Reply

Beadlesprout69

Posts
101
Reactions
106
Joined
Mar 23, 2020
Points
43
Apr 17, 2020
#59
I read a good few years ago about a grower who supplemented his blurple with a uvb for 2 hours during the middle of the day. He swore by it. I run CMH and have seen a difference in thc production slightly with them.

In the UK in the past the max wattage we had was a 60w reptile lamp, they do a higher wattage now.

I'm sure I remember him telling me not to go in the grow room when the uvb light was on as it could be harmful to health.

This is testing the grey matter though, it was years ago on another forum
 
Quote Reply

Beadlesprout69

Posts
101
Reactions
106
Joined
Mar 23, 2020
Points
43
Apr 17, 2020
#60
I remember seeing a lighthouse led light with a uvb lamp mounted in the centre a good few years ago. I think they were from the states but they were incredibly dear.
 
Quote Reply
Page 3 of 4 · Replies 41–60 of 72
Prev
  • 1
  • 2
  • 3
  • 4
Next
First Prev 3 of 4 Next Last

Thread info

Replies 71
Views 47,429
Started Nov 29, 2017
Latest post Jan 27, 2021
Starter Dr kabuki
Forum L.E.D Grow Lights

Latest posts

  • 2026 Outdoor Grows! let's see em!
    • Latest: GrowinShurts
    • 3 minutes ago
    General Outdoor Growing
  • Whats going on with my plant
    • Latest: WinJr63
    • 19 minutes ago
    General Indoor Growing
  • Cpurola's Outdoor grow in Southeast Michigan 2026
    • Latest: Hossgrows
    • 47 minutes ago
    General Outdoor Growing
  • Frebo Can’t Stop Growing living in the Woods
    • Latest: Galgrows
    • Today at 5:39 PM
    General Outdoor Growing
  • Blazing heat, smoke-filled skies, illegal! What could possibly go wrong?
    • Latest: GNick55
    • Today at 5:31 PM
    General Outdoor Growing
  • Home
  • Forums
  • Medical Cannabis Cultivation
  • Growroom Design & Setup
  • L.E.D Grow Lights
  • When To Uvb
  • Contact us
  • Terms and rules
  • Privacy policy
  • Help
  • Home
Community platform by XenForo® © 2010-2026 XenForo Ltd.
Menu
Log in

Sign up

  • Home
  • News
  • Classifieds
  • Forums
    • What's new Featured content New posts New Articles New articles New products Latest activity
  • Social
  • Strains
  • Live
  • Learn
  • Brands
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?