Mac1981
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270 watts of LEDs got me 18 ounces dry in a 3x4 space so I won't even look at a 315 CDM.View attachment 835573 View attachment 835574
Uvb is a part of thc production. It influences most plants that use a similar defense to uvb and environment. Anecdotally, its noticeable when you add uvb to just hps(and probably more so with led). We're not totally sure of plant mechanisms, but we're reasonably certain that trichomes and thc and terpenes specifically are part of cannabis' defense to heat, water loss, uvb damage from the sun, insect and herbivore defense, and potentially even part of affecting the surrounding soil and plants. It seems likely to me that uvb exposure could be a limiting factor to thc production. Theoretically, a certain amount of uvb exposure is required to allow the genetics to express their full genetic cannabinoid and terpene content. Anecdotally, people do comment often about quality increase just from switching to cmh from old hid bulbs and i believe this is due to greater uvb exposure.What lamp are you running there?
I don’t think I could keep my space warm enough with 270 watts. Even the 315 is a little low powered.
And I bet you could have done as well with those cuttings and a 315 Phillips 3100k bulb. But I do see your point with even lower watts.
Does the led include uv? The 315 puts out even uvb. Although honestly I am not sold on uv being something I want more of inside. Just curious.
Uvb is a part of thc production. It influences most plants that use a similar defense to uvb and environment. Anecdotally, its noticeable when you add uvb to just hps(and probably more so with led). We're not totally sure of plant mechanisms, but we're reasonably certain that trichomes and thc and terpenes specifically are part of cannabis' defense to heat, water loss, uvb damage from the sun, insect and herbivore defense, and potentially even part of affecting the surrounding soil and plants. It seems likely to me that uvb exposure could be a limiting factor to thc production. Theoretically, a certain amount of uvb exposure is required to allow the genetics to express their full genetic cannabinoid and terpene content. Anecdotally, people do comment often about quality increase just from switching to cmh from old hid bulbs and i believe this is due to greater uvb exposure.
Just a simple F-strip home build with some supplemental diodes.What lamp are you running there?
I don’t think I could keep my space warm enough with 270 watts. Even the 315 is a little low powered.
And I bet you could have done as well with those cuttings and a 315 Phillips 3100k bulb. But I do see your point with even lower watts.
Does the led include uv? The 315 puts out even uvb. Although honestly I am not sold on uv being something I want more of inside. Just curious.
Just a simple F-strip home build with some supplemental diodes.
For winter I'll have to throw the 750 DE back up for additional heat. This summer my dehumidifiers and the 750 would overload my a/c capability, it's been an excessively humid fall this year.
I'm not sold on the uv lighting for trich production, I've ran the 10k finishing bulbs and the old 330 watt CMH in 4k and I really can't say I saw a difference in quality or production. Only thing I noticed is a increase of the maturation of the trichs sooner.
Going good here for now, glad for the cooler weather finally. Lost all my outdoor plants to mold this year because of the messed up weather.I see that too. The cmh starts flowering earlier and finishes 7-10 days sooner on some plants.
Right now I am comparing 12/12 Grows. The 315 in a 3x3 tent and only hps in the flower room.
I got bored again. Lol.
How’s everything going this year with you and your family? We haven’t chatted in quite a while.
Going good here for now, glad for the cooler weather finally. Lost all my outdoor plants to mold this year because of the messed up weather.
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