using UV to put plants to sleep

NWbordergrower91

NWbordergrower91

Member
To cut this short since I have a tendency of rambling, I've recently stumbled across Ed Rosenthal's bit of info on using UV for flowering cannabis as a lighting supplement. It's got me very interested, and I plan to use it when I start my next flower round.

However, something I came across I saw online in a related post (on this site too if I remember correctly) that said something about how UV can actually help give the plant a kick start into its sleep.

The way they broke it down as I understood it is when the plant is about to go into "night" and your lights are shutting off, leave your UV on for about 20 minutes and ONLY your UV on for that short period, to trigger the plant into sleeping. So rather it taking the plant anywhere from 1 to 2 hours to "fall asleep", it gets ready in 20 minutes, giving it a better chance of a true 12/12 cycle.

Obviously I can flower juuuuuuuust fine without the UV and the plant will go to sleep juuuuuust fine on a normal set up. I'm just curious as to whether not someone out there with experience can put their 2 cents into this for me. Does it really work? Did the plant seem happier or more aggressive during the days with its growth rate?

Thanks again
 
qwizoking

qwizoking

Well-Known Member
No, and it falls asleep as soon as lights go out. The hormone responsible for flowering not stable in light. Does not need any aid
 
NWbordergrower91

NWbordergrower91

Member
That was the understanding I had come to so far from what I've read. I dont know anyone personally that tried using them but everyone I talk to has at least heard of it. I figure it cant hurt, and is a decently cheap investment to experiment with.

I'm mainly to see the difference if any from combining it with my set up
 
NWbordergrower91

NWbordergrower91

Member
its links like that, that make me curious to at least try it. All in all, i havent read a thing really saying it harmed anyones plants much. So that at least gives a piece of mind.

It'll be a nice addition with my led set up as is
 
cannawizard

cannawizard

Well-Known Member
NWbordergrower91 said:
To cut this short since I have a tendency of rambling, I've recently stumbled across Ed Rosenthal's bit of info on using UV for flowering cannabis as a lighting supplement. It's got me very interested, and I plan to use it when I start my next flower round.

However, something I came across I saw online in a related post (on this site too if I remember correctly) that said something about how UV can actually help give the plant a kick start into its sleep.

The way they broke it down as I understood it is when the plant is about to go into "night" and your lights are shutting off, leave your UV on for about 20 minutes and ONLY your UV on for that short period, to trigger the plant into sleeping. So rather it taking the plant anywhere from 1 to 2 hours to "fall asleep", it gets ready in 20 minutes, giving it a better chance of a true 12/12 cycle.

Obviously I can flower juuuuuuuust fine without the UV and the plant will go to sleep juuuuuust fine on a normal set up. I'm just curious as to whether not someone out there with experience can put their 2 cents into this for me. Does it really work? Did the plant seem happier or more aggressive during the days with its growth rate?

Thanks again
Click to expand...
i have never heard of anyone using ultra violet to "help" kick start the sleeping process.. just turn off all the lights and viola-- its "bed time" --tho the plant really is not asleep, it just goes into its dark cycle functions :P

imho, no. uv won't help it under that application.

but feel free to experiment, nothing wrong with finding out yourself :) i had cool prof in college that always said, "there are no stupid questions, but there are shit tons of stupid answers".. Lol

#cheers
 
NWbordergrower91

NWbordergrower91

Member
hahaha i love it. Very true and seems obvious enough that they wouldn't need the aid. I just ran across a couple posts when I originally started looking into the UV and just caught my curiosity. Thanks for the input, as far as helping them sleep no go but they'll still get a little boost from them when I get into flower next.

Also random question and I'm sure its on here somewhere, but what does everyone think about Phresh duct silencers, the ones with the acoustic sound pad inside of it. I was thinking of building one, and aside from using insulated ducting I figured that would be the extent I'll go to help "silence" things outside of the room.

The fan is mounted inside the room, the room is fully sealed 1/2' plywood built with a 2x2 framing. Any holes cut or door frames made into are all sealed and weather stripped. All ducting (still need to buy) is going to run from the top of the room, to the floor, along my wall, and vent out into my bathroom. I'm good on heat and what not, just wondering if theres any other go-to's for helping reduce noise. I know most of the noise is actually from the moving air itself and not actually the fan (although it still has its fair amount). Input?
 
G

getsoutalive

Well-Known Member
Not UV. IR. or near IR.

Many on the LED board are using a 730nm LED lights for 10 minutes at lights out to increase nighttime hormone release and supposedly speed the day to night transition by up to two hours. Claims are for faster flowering times if the light cycle remains at 12/12 or allowing for longer daylight times (14/10 or 13.5/10/5) without extending the flower period, thereby increasing yields. I cannot confirm any of this yet. But many respected LED members are convinced.
 
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Dr. Who

Dr. Who

Well-Known Member
Interesting to be sure.....I was in the "Dam" over the first part of the year and missed that earlier thread - Nice of you to link it....


Anyway......I have 2 of those overpriced LEDs and am not totally impressed by what they do.....Yes, they put the plant into night mode in minutes and not hrs.....Do you gain from being able to have the lights on 2 hrs longer? Sadly, no.....I gain more on my electric bill then in yields....

I think you should know that in reality .... Cannabis is a "short day - long night" plant. I don't like 12/12 as if you lower to 11/13 or 10/14 you get better, more stable results.......No loss in yields.....I'm running some 6-8/18-16 tests from some researching.. maybe more on that when it's done....12/12 has always given me to many variables.....not so/they go away with even 11/13......

The 730nm range does put the plant to "sleep" faster.....But your barking up the wrong tree if you want them to actually make a difference in quality/yield.

Doc
 
ttystikk

ttystikk

Well-Known Member
getsoutalive said:
Not UV. IR. or near IR.

Many on the LED board are using a 730nm LED lights for 10 minutes at lights out to increase nighttime hormone release and supposedly speed the day to night transition by up to two hours. Claims are for faster flowering times if the light cycle remains at 12/12 or allowing for longer daylight times (14/10 or 13.5/10/5) without extending the flower period, thereby increasing yields. I cannot confirm any of this yet. But many respected LED members are convinced.
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Ya know... My HID lamps stay hot for about ten or fifteen minutes after the power is cut to them. I wonder if this has any effect? Spectrum and timing sure seem to match up...
 
NWbordergrower91

NWbordergrower91

Member
all about shopping for the right LED at the right price, paying $400ish for something that'll match a 600w HID set up, and not have to replace all the parts within a year or so.

With proper knowledge you can find some that will do just what you need for upto 3-5 years if not more. Yes you do need new phosphorus layers but thats still years down the road

bit of an investment to start off, but much better than rotating out old with new bulbs, new reflectors, ect. Will look into the IR or near IR to see what others feel on the matter
 
Dr. Who

Dr. Who

Well-Known Member
NWbordergrower91 said:
all about shopping for the right LED at the right price, paying $400ish for something that'll match a 600w HID set up, and not have to replace all the parts within a year or so.

With proper knowledge you can find some that will do just what you need for upto 3-5 years if not more. Yes you do need new phosphorus layers but thats still years down the road

bit of an investment to start off, but much better than rotating out old with new bulbs, new reflectors, ect. Will look into the IR or near IR to see what others feel on the matter
Click to expand...
If it's light spectrum information your looking up....Check on the info from Jorge Cervates and Ed Rosenthal........Google 730nm pfr lighting in growing. PAR lighting is what makes the plant grow the most fastest....That's HPS over MH.....Google PAR lighting in plant growth too.......read the college papers and the hort texts that will come up....

As soon as you hit the 670nm band, your turning the daylight response of the plant back on.....

I think you missed something in the other thread's link's. It's not a plasma or induction lighting system that do the job......Here - 4th item down the page - THE FLOWER INITIATOR
http://www.led4growth.com/All Lighting Products.htm#EXPERIMENTAL PRODUCTS

Happy reading

Doc
 
Dr. Who

Dr. Who

Well-Known Member
ttystikk said:
Ya know... My HID lamps stay hot for about ten or fifteen minutes after the power is cut to them. I wonder if this has any effect? Spectrum and timing sure seem to match up...
Click to expand...
The brief time as they shut down. They reproduce the deep red nm range over 690. It's this time when they get a taste of the 730nm..As with the plant getting even a short blast of light to stay in veg.....It gets a shot of that 730nm to initiate night change....longer exposures get it changed faster.....out to about 10-15 min is all it takes to cut the 2 hrs of lag time...

Doc
 
ttystikk

ttystikk

Well-Known Member
Dr. Who said:
The brief time as they shut down. They reproduce the deep red nm range over 690. It's this time when they get a taste of the 730nm..As with the plant getting even a short blast of light to stay in veg.....It gets a shot of that 730nm to initiate night change....longer exposures get it changed faster.....out to about 10-15 min is all it takes to cut the 2 hrs of lag time...

Doc
Click to expand...
I didn't follow you here. Are you saying that the infrared glow from high wattage HID lighting is or is not acting on this principle?
 
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