UV necessary ? Vote

MarsHydroLED · Dec 3, 2019

Hi farmers, please kindly do us a favor, your vote!

As you know we have 2 new lines lights, the Mars Hydro TS and SP, which the LEDs we have been to promote here, I just confirmed that Mars Hydro SP250 has UV lights. So we are collecting data and might do some improvements to our other lights. Do you think it will be necessary to add UV lights to our TS series as well? Please feel free to vote, thank you in advance.

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ozarkgrey · Dec 3, 2019

i have yet to find any solid evidence that the addition of UV helps promote any substantial growth

OG

MarsHydroLED · Dec 3, 2019

Thank you ozark, but please kindly also do vote on the top☺

ozarkgrey · Dec 3, 2019

MarsHydroLED said:
Thank you ozark, but please kindly also do vote on the top☺

i did

Aqua Man · Dec 3, 2019

Depends on the light source you are using to start with. There is plenty of scientific data to show a benefit in trichome production not bud size. While there is some great info and studies out there I think the optimal intensity, duration and combination of UVB/UVA has yet to be determined.

MarsHydroLED · Dec 3, 2019

Yeah, not the buds. I read the papers said that the UV can create a great smell, produce more THC, this is the point

Aqua Man · Dec 3, 2019

MarsHydroLED said:
Yeah, not the buds. I read the papers said that the UV can create a great smell, produce more THC, this is the point

Yes approx 20-30% increase in thc has been reported but that % increase not over all increase. Like 20% average could by acounts reach 26%. That's the extreme.

ozarkgrey · Dec 3, 2019

MarsHydroLED said:
Yeah, not the buds. I read the papers said that the UV can create a great smell, produce more THC, this is the point

even if this were so and maybe it is, how would you handle the length of time when UV/UVC rays start to damage the plant?

Aqua Man · Dec 3, 2019

ozarkgrey said:
even if this were so and maybe it is, how would you handle the length of time when UV/UVC rays start to damage the plant?

There quite a bit of data on this and I think it was first observed in like the 70's I wanna say but that could be 20 yrs off. UVB seem to be the most important UV. Studies show Combination of UVA and UVB to be best. You don't want any UVC that will kill plants in minutes if not seconds.

MarsHydroLED · Dec 3, 2019

Aqua Man said:
Depends on the light source you are using to start with. There is plenty of scientific data to show a benefit in trichome production not bud size. While there is some great info and studies out there I think the optimal intensity, duration and combination of UVB/UVA has yet to be determined.

ozarkgrey said:
even if this were so and maybe it is, how would you handle the length of time when UV/UVC rays start to damage the plant?

I believe that most growers more care about the tightness of the buds, quality and the smell compared to the buds' size. But why not UVA? Some companies now in the market mainly add the UVA, not the UVB. And ozark right, the UVC can kill living cells, damage the plant. For outdoor the UVC actually y filtered out by earth's atmosphere, it's not the component of natural sunlight

Aqua Man · Dec 3, 2019

UVA alone does not provide the same results. The best results have been a combination but from what I have researched UVB is the most important. That's not to say UVA is not beneficial

ozarkgrey · Dec 3, 2019

Aqua Man said:
20-30% increase in thc has been reported but that % increase not over all increase. Like 20% average could by acounts reach 26%. That's the extreme.

so taking, a average strain of say 15% THC to levels of 21.6 % or higher. man 3.6 is 3.6 or a 1/8 lol

MarsHydroLED · Dec 3, 2019

With UV or not UV; with UVA, UVB, UVC, or a combination, that is a question!

Aqua Man · Dec 3, 2019

Infact the reptisun 5.0 shows is close to the same spectrum that has show these 20-30% increases. The timing is crucial also. You can do harm to the plants...timer mishap and you WILL have dead plants with those. There is a lot of info out there I'm just not all up tonspead on it.

Aqua Man · Dec 3, 2019

ozarkgrey said:
so taking, a average strain of say 15% THC to levels of 21.6 % or higher. man 3.6 is 3.6 or a 1/8 lol

At 15% the best you could hope for would be 18-19.5% according to info. I have not tested.

Aqua Man · Dec 3, 2019

MarsHydroLED said:
With UV or not UV; with UVA, UVB, UVC, or a combination, that is a question!

Only UVA and UVB. UVC will kill plants.

1diesel1 · Dec 3, 2019

Plants use sunlight for photosynthesis and are exposed to ultraviolet (UV) radiation that is present in sunlight. UV radiation is divided into 3 classes: UV-A, UV-B, and UV-C. The Ultraviolet-C (UV-C) region of the UV spectrum includes wavelengths below 280 nm; these highly energetic wavelengths are absorbed by ozone and are not present in the sunlight at the earth's surface. Under normal growing conditions, effects of UV-C light are not seen on plants. This research examined the effects of the application of ultraviolet-C irradiation (UV-C) on greenhouse ornamental plants and demonstrated very promising uses of UV-C as a treatment to increase branching and reduce the height of plants, and in some situations, affect the rate of flowering. Several conclusions have been made from this research that are consistent with multiple plant species. First, the amount of UV-C light that a greenhouse plant receives is critical to its response. The proper weekly dosage, for as little at 15 min a week, will control a plant's growth response. In addition, too high a dosage of UV-C irradiation will burn plants and too low will have no effect. Second, proper applications of UV-C light decreases final plant height. Several plant species have responded to applications of UV-C light by growing shorter than the control plants that receive normal greenhouse lighting. Third, UV-C light increases branching of greenhouse plants. At appropriate dosage rates, UV-C light increases branching on some species and increases the number of flowers that are produced. This avoids the need to pinch plants and to apply plant growth regulators. Fourth, the application of UV-C light can affect flowering time. The application of UV-C irradiation can either delay flowering or cause earlier flowering depending on plant species and dosage rate. In some cases, the increased branching is accompanied by delayed flowering.

ozarkgrey · Dec 3, 2019

MarsHydroLED said:
I believe that most growers more care about the tightness of the buds, quality and the smell compared to the buds' size. But why not UVA? Some companies now in the market mainly add the UVA, not the UVB. And ozark right, the UVC can kill living cells, damage the plant. For outdoor the UVC actually y filtered out by earth's atmosphere, it's not the component of natural sunlight

i would assume the amount is safe for our purposes, and doesn't constitute a significant cost to either the manufacturer which is in turn passed onto the buyer . will the UV lights be controlled by a switch for the flower cycle?

Aqua Man · Dec 3, 2019

Some links I have read on it. If ya want. There are tons.

Frontiers | An Update on Plant Photobiology and Implications for Cannabis Production

This review presents recent developments in plant photobiology and lighting systems for horticultural crops, as well as potential applications for cannabis (...

www.frontiersin.org

I found this one to be a really good up to date info on lighting.

ozarkgrey · Dec 3, 2019

Aqua Man said:
At 15% the best you could hope for would be 18-19.5% according to info. I have not tested.

yeah i started with street weed and went to mids @18% and back to the street with 15. sorry about my bad math, bet your glad i'm not your dealer

UV necessary ? Vote

UV necessary ? Vote

Do you think it is necessary to add UV chips to the LED grow light?

Yes, it will help on growing

No, not much help

Others, please kindly comment your ideas

MarsHydroLED

Premium Member

ozarkgrey

MarsHydroLED

Premium Member

ozarkgrey

Aqua Man

MarsHydroLED

Premium Member

Aqua Man

ozarkgrey

Aqua Man

MarsHydroLED

Premium Member

Aqua Man

ozarkgrey

MarsHydroLED

Premium Member

Aqua Man

Aqua Man

Aqua Man

1diesel1

ozarkgrey

Aqua Man

Frontiers | An Update on Plant Photobiology and Implications for Cannabis Production

ozarkgrey

UV necessary ? Vote

UV necessary ? Vote

Do you think it is necessary to add UV chips to the LED grow light?

Yes, it will help on growing

No, not much help

Others, please kindly comment your ideas

MarsHydroLED

Premium Member

ozarkgrey

MarsHydroLED

Premium Member

ozarkgrey

Aqua Man

MarsHydroLED

Premium Member

Aqua Man

ozarkgrey

Aqua Man

MarsHydroLED

Premium Member

Aqua Man

ozarkgrey

MarsHydroLED

Premium Member

Aqua Man

Aqua Man

Aqua Man

1diesel1

ozarkgrey

Aqua Man

Frontiers | An Update on Plant Photobiology and Implications for Cannabis Production

ozarkgrey

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