Does UVA increase cannabinoids?

UVA not worth adding to led grow lights. UVB however....

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[concreter]

i bought 2 spider farmer uva bars and run them for 1 hour a day, i have noticed the plants are packing on more trichomes than usual so far so good.

[davidc.]

UVA doesn't increase cannabinoid production or photosynthetic activity and it is less efficient at reducing stem elongation than blue light. Okay. So what about terpene production? Isn't improving taste and smell sufficient reason to use UVA? . Shane failed to get Dr. Bugbee to address this question. It's premature to say that it is not worth adding UVA.

[mattbrigner]

UVB reptile lights has increased terpene production on a 4-week flower that I've been growing for a couple years now that never did that before.. still have five more weeks to figure out what the end result will be..
Two times a day for 45 minutes at the distance of 18 in from canopy top

[СлавикСлавентино]

Perhaps UV or IR helps the plant to better resist diseases, pests and prevents mold in the buds? I read somewhere about such a theory. Has such a scientific study been carried out?

[stephenaccomando]

There's UVA in natural sunlight... so clearly, it's meant to be part of the equation. Just because you can't necessarily figure it out... doesn't mean it shouldn't be part of the growing equation.
JMO 😎 ☮️ 🖖

[ronevergrow]

It works especially like the last two weeks 15 minutes four times a day you will see the snow come on.

[craigengelman]

Spider Farmer UV30 is only $60 for 2 strips . i have 4 hyperlight groplanner 1500 with the uv lights in the midlle . the uv lights come on in the last of the night with 2 hours on per day . lights are on 12/12 in a 5x5 tent with 4 blackberry moonrock from expert seeds grown in dwc 2nd grow done like this . i use blue planet elite 3 part with microbe hydroponics declorinator and photosynthesis plus in my tap water . on average im getting 14-18 dry oz per plant . before the uv30 i was getting 12-14 and the flovors with nothing compared to now, best $60 i ever spent !!

[jakelooter]

I noticed a difference in pigmentation and tissue VIGOR within hours of initiating UV A (AC Infinity U4) early flower on two subjects. Extremely experienced biocultivator in numerous spheres. Upon Stress testing w the UV A I was able to singe back pistils on both subjects at around 2-3 weeks in. So it definitely burns, but I left on for an extended period (stress test), proper distance, level 5 out of 10, it was able to burn the sensitive tissue mildly and cause a clear and obvious increase in vigor. Take a look at plants in your park in the full sun then take a look at the ones struggling in some shaded area. There you go. it didnt take a pile of NASA grants to deduce that...

[cjfredi]

The two best authorities on plant lights IMHO.

[gedeuchnixan]

Might not does really do anything for cannabis, but for chillies I´m sure their spicelevel depents on UV afterall Bhut Jolokia taken from India grown in Italy got up to 1.6mio. scuville (in India up to 1.2mio) and Scropio who´s growing them in the californian sun gets up to 2.2mio scuville. Seems like UV intensety does effect chilli plants, growing altitude in California and India could be similar.

[stefanjankovic]

The bud seems to look like it shrinks a bit under uv and notice that it doesn't matter what bulb or light also noticed you can get similar effect with blurplue leds😊

[foofooblenda]

I SHOULD REDO THE VIDEO INTO 10 SECONDS HI THANKS FOR HAVING ME (
A: YES OK? BYE