Emerson Effect + End of Day Effect + UV Effect supplement bars with Geekbeast 630watt
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Hey! got a question or two for you, im looking to add some UV to my light set up and my first question is:
Is it worth it to add only UVA 395nm without any UVB 285nm and 310nm?
Second question is: Do you think any of those could help? (the link below)
13.17C$ 29% OFF|Newest Design UVC LED Module Germicidal UV Lamp Ultraviolet Light 12 16V For Sterilization (145/300)x20x2mm 2.5W/5W/10W|Light Beads| - AliExpress
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nachooo
Well-Known Member
Dont use that lamp..has UVC not UVB..is dangerousHey! got a question or two for you, im looking to add some UV to my light set up and my first question is:
Is it worth it to add only UVA 395nm without any UVB 285nm and 310nm?
Second question is: Do you think any of those could help? (the link below)
13.17C$ 29% OFF|Newest Design UVC LED Module Germicidal UV Lamp Ultraviolet Light 12 16V For Sterilization (145/300)x20x2mm 2.5W/5W/10W|Light Beads| - AliExpress
Smarter Shopping, Better Living! Aliexpress.com
It is worth! UVA itself has benefits of course, shorter plants, more colors, denser buds, and probably certain increase in THC..probably not as much as with UVB addition...
Whatch results of UVA and UVB leds added...
DCcan
Well-Known Member
2019 study. Very little proof, just charts everywhere. You can foxtail with continuous red during flower and good lights don't need it anyway.
Applying it diffusely is key to whatever you are trying to do. Playing tricks on plants, wonky stuff goes on.
Someone's using them in Netherlands for veg crops, and a couple ongoing studies in Canada, Israel, China. Mostly it's small definitive increases in crop size/ earlier crop for a small amount of energy, not something photogenic, like blurple skies.
Thx for answering! Nice pics!
So those have no chance to help?
Yeah they call em UVC but If im right the line between UVC and UVB is at 280nm?
Those are 265-285nm are they near enough the UVB?
I asked because I saw some Mars Hydro claiming UV between 260nm and 400nm
And one last thing I got to ask... If I decide to go without UVB, and just use some UVA 395nm, Do I get any significant gain if I add some 365nm (since they cost the double of the 395nm)?
Again ty!
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nachooo
Well-Known Member
Well.. when you have a 285 nm led..of course 285 is the peak of its emission and it emits some light in closer wavelenghts...Lower than 285 and you are in UVC territory...So even a 285 is dangerous...for this reason you should use it with caution...But if you initially use a 280 nm or lower led...the problem increases a lot...and with a 275 nm led..much more...IMHO never use less than 285 nm leds...and to be fair I would use 295 nm instead..but they are not easy to find...Thx for answering! Nice pics!
So those have no chance to help?
Yeah they call em UVC but If im right the line between UVC and UVB is at 280nm?
Those are 265-285nm are they near enough the UVB?
View attachment 4785644
I asked because I saw some Mars Hydro claiming UV between 260nm and 400nm
View attachment 4785649
And one last thing I got to ask... If I decide to go without UVB, and just use some UVA 395nm, Do I get any significant gain if I add some 365nm (since they cost the double of the 395nm)?
Again ty!
So for this alone reason..the lamps you mention are not good to use...Also their light distribution pattern is bad for growing...too much UVB light.. I mean...5 watts or 10 watts of near UVC/B (260-285) is a lot...for a small tent...I use in a square meter tent about 3 hours 60 mw..this is about 3,6 watts of pure 285nm in my case....I use about x10 watts of UVA also so aprox 30-40 watts..but continously all day long.
Forget those lamps they are not appropiate..a UVA/B reptile fluoro like arcadia will distribute light much more better.. If you want the led route ..do what I did..built the lamp yourself ..so you distribute the light correctly and add the correct wavelenghts.. They are not good UVA/B lamps in market..only fluoros are well designed for growers..like solacure brand...
Cutter has some UVA/B strips but in my opinion are not designed for little spaces like 3x3 or 4x4..
Mars Hydro should be not be selling that lamp...260 nm is really dangerous.. I think is an error and they mean 360...well that speaks for itself about quality of the company..and if is true and the lamp emit at 260 nm range..they should go to jail..unless they sell the lamp for sterilization purposes...
I think that using 365 mixed with 395 is better than 395 alone... but you can use 395 alone..is up to you..
You're awesome man! THX for answering and also for the time you took to do it!
Got a couple more for you but I wouldnt want to abuse your time! Feel free to ignore if you want
If I undertand well I should check for some 295nm or maybe some 310nm?
Since I dont get much space my flowering set up is 2 tents 2x2x4, how many watts of UVB would I need in such a small space (2x2)?
So far my light set up in each tent a Meijiu QB288 LM301H 3000K and 2 Kingbrite QB11 660nm Cree XP-E2 and 6 RapidLed star Led 730nm on a seperate channel to be able to use it for emerson effect during light on and also as EoD treatment, I would need to add some UV
Here is some pics of the last run with ONLY the Meijiu QB288 LM301H 3000K
EDIT: I think your 100% right on Mars Hydro, must be 360nm and not 260nm
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nachooo
Well-Known Member
295nm and 310nm are difficult to find , 285 is much more easy, and probably cheaper, but if you find them I think they are better and more safe...You're awesome man! THX for answering and also for the time you took to do it!
Got a couple more for you but I wouldnt want to abuse your time! Feel free to ignore if you want
If I undertand well I should check for some 295nm or maybe some 310nm?
Since I dont get much space my flowering set up is 2 tents 2x2x4, how many watts of UVB would I need in such a small space (2x2)?
So far my light set up in each tent a Meijiu QB288 LM301H 3000K and 2 Kingbrite QB11 660nm Cree XP-E2 and 6 RapidLed star Led 730nm on a seperate channel to be able to use it for emerson effect during light on and also as EoD treatment, I would need to add some UV
Here is some pics of the last run with ONLY the Meijiu QB288 LM301H 3000K
EDIT: I think your 100% right on Mars Hydro, must be 360nm and not 260nm
Better than using watts as a way to calculate UV irradiation...use radiant output power...cause same wats can give different amounts of UV...with different led brands,, and also plants can react differently to uvb so you have to find what suits to your genetics..... I use 60 mw of UVB 285nm light each aprox 9 or 10 square foot during 3 hours a day...so extrapolate to your area..but this is 285 nm light radiation...so if you use 295 or 310 you should use more time or more light intensity...
Resuming find in the uvb leds datasheet their radiant output at at determinate amperage...in 4 square foot you will need about 30 mw ...You can use a 285 nm led each square foot...As most 285 nm leds give about 10 mw of power at 100 ma (at least the ones I use) Using the 4 leds during about 2 hours a day could be enough...
To be more precise ..use about 20 mw total irradiation of 285nm per square foot in a day
Nice buds . Congrats!
Rocket Soul
Well-Known Member
I agree with Nachooo on those uvc: this should probably be the last thing to add to your system. When looking at uvc at alibaba: be careful you understand all the specs properly. Many of uvc leds have non standard optics which throws the calculations off: if the angle of throw is 60° instead of standard 120° this will focus the light and increase needed hanging height.
To me it would make sense to add uv/sub-450nm in a few places, ymmv:
420: hits interesting peaks of transpiration, but i havent found a great cost/quality diode, maybe Tekniks pc-blues when they are released.
395-405: this range leds have quite good efficiency, should help some with potency.
365nm: UVA, has a peak in uv response, helps transpiration.
One smart strategy may be to add some of these before uvb, as straight up uvb seems to be hard for the plant. The Uva seems to toughen up the plant a bit and also seems to have efrect on potency
To me it would make sense to add uv/sub-450nm in a few places, ymmv:
420: hits interesting peaks of transpiration, but i havent found a great cost/quality diode, maybe Tekniks pc-blues when they are released.
395-405: this range leds have quite good efficiency, should help some with potency.
365nm: UVA, has a peak in uv response, helps transpiration.
One smart strategy may be to add some of these before uvb, as straight up uvb seems to be hard for the plant. The Uva seems to toughen up the plant a bit and also seems to have efrect on potency
Thx for the input man!
After all those great infos from nachooo and you I've decided to take the UVA 395nm way!
Now got to decide which option is better to do it:
Option 1: I could use 2 Kingbrite QB11 395nm Strips
or
Option 2: Add 6 or more 395nm stars Led from RapidLed
Option 1 is 22 Leds per tent... is it too much?
Option 2 is 6 Leds per tent... is it enough?
Again TYVM guys!
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Rocket Soul
Well-Known Member
With rapid led you would have a wider range of uv nm available to buy, but kb is solderless.
Hey! I got one more question for you guys!
When I check the RapidLed.com I see that the 365nm is 55 degrees viewing angle and the 395nm is 125 degrees.
Does that mean I need more 365nm to cover the same space as the 395nm or it means that the 365nm is more focus on one point and needs to be higher than the 395nm?
When I check the RapidLed.com I see that the 365nm is 55 degrees viewing angle and the 395nm is 125 degrees.
Does that mean I need more 365nm to cover the same space as the 395nm or it means that the 365nm is more focus on one point and needs to be higher than the 395nm?
nachooo
Well-Known Member
Forget the 55 degrees viewing angle...is not appropiate this kind of light spread...if you want 365 ...look for more 120 degrees or more.