UV A And UV B In Late Flower
- Thread starter Skunk Baxter
- Start date
BobCajun
Well-Known Member
I guess they do put some UVB out, not a lot in the 290-315 Cannabis potency range though. Here's the page. The spectrum also looks very similar with and without the "shielding glass". I know that CMH grow more potent product than HPS or LED, 22% vs 18% for the other two, in the test I saw. Maybe that's why, a little UVB at 315 nm.
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greasemonkeymann
Well-Known Member
if I were to guess, i'd say it's mostly the blue spectrums, reason I say that is even the oldschool MH bulbs tended to give the appearance of bigger glands.
but with this bulb it's even more noticeable.
BUT the caveat being I tried new strains with this bulb, more specifically hashplant strains from Bodhi, soooo those are normally a pretty chunky plant.
BUUUUT furthermore, this is a grow where the hps is in the corner, and the mh is next to it.
If you were there, you'd be able to visibly see the difference, and in my opinion it's obvious that the MH side looks nicer.
the bulbs are roughly the same age, although I did do one single harvest with that other HPS, but it's still well within it's lifespan.
It's something I urge people to try on their own, it's worth the 75 bucks or so
another thing to note, I didn't get any powder mold this harvest, not even a spot....
And that was during those big-ass California storms we had
Sorta wonder if it works like a aquarium uv sterilizer
greasemonkeymann
Well-Known Member
I see they didn't test the 600?
Here is a link to the info regarding those, and it's significant uv at the 300 range
http://solis-tek.com/solistek-600w-mh-10k-finisher-de-lamp.html
the pdf on the page shows the graph
BobCajun
Well-Known Member
Weird that they cut the chart off at 350. You can see there must be a bunch more below that. Maybe dangerous amounts or maybe hardly any from 315-290. Very suspicious that they know it's UVB that increases potency and yet they cut the graph off before that. Have you heard from anyone who used them, as to whether it increases potency much?
greasemonkeymann
Well-Known Member
nah.. I was the guinea pig in my circle of growers
This time I am running plants and strains that I've done before, so i'll be able to tell a lil better
This run is grapegods and some sour lemon og, both I've ran before
I'm not really in LOVE with the bulb I prefer to not get too excited with any strains or techniques before I thoroughly test them
It literally LOOKS better on the 10k side, than the hps, lights on or off.
Another thing to note is the shade of green is a speck lighter on the MH side, I assume it's due to the increased blues.
Almost appears sorta lime-green like an outdoor grow would.
And no it's not a nitrogen def
whitebb2727
Well-Known Member
I will maybe go hid if I get around to building a room. I couldn't run a 600 unless it was air cooled in my cab. I was considering putting a 600 in it. I decided I wanted to do a few more runs with my t5 and try different spectrums.
whitebb2727
Well-Known Member
According to rm3, the blue gives you more tricomes and the visual difference. The uvb gives you more resin production.
My first run on t5s was with all blue bulbs and they were frosty.
Its the reason I like mixed spectrum.
ttystikk
Well-Known Member
From various sources I trust, I've gleaned a few nuggets along the way;
UVB peaking around 315nm is the desired spectrum for increased resin production and potency.
The spherical shape of the resin glands on the leaf, plus the pad inside where resin production occurs, seem to actively focus UVB. This leads me to believe that our interest in the plant should be a lot more focused on the production of those glands than current practices suggest.
Because of the hazardous nature of UV light to humans, it makes sense to generate it with different sources than the main lighting and shut it off when people are in there. Personally, I'm not a huge fan of working in the dark.
The amount of UVB a plant gets can change the perceived high dramatically.
Again, these are nuggets I've scrounged up, all are fair game for debate or disavowal.
UVB peaking around 315nm is the desired spectrum for increased resin production and potency.
The spherical shape of the resin glands on the leaf, plus the pad inside where resin production occurs, seem to actively focus UVB. This leads me to believe that our interest in the plant should be a lot more focused on the production of those glands than current practices suggest.
Because of the hazardous nature of UV light to humans, it makes sense to generate it with different sources than the main lighting and shut it off when people are in there. Personally, I'm not a huge fan of working in the dark.
The amount of UVB a plant gets can change the perceived high dramatically.
Again, these are nuggets I've scrounged up, all are fair game for debate or disavowal.
517BlckBerry
Well-Known Member
I use a mix of MH and HPS in flower. Always produced better buds than strictly hps. This round in my new room I think I'm going to run HPS until a little before flush. Then switch to MH bulb ? Hmm...
ttystikk
Well-Known Member
So I'm cooking up a new lamp combo. With the help of some friends, it seems that the 860W CDM Allstart lamp from Philips has a surprise trick up its sleeve; the ability to run on 1000W. That's what it does on a magnetic ballast that's wired to 120 or 240V. On the mag, its performance isn't anything to write home about.
However, if one can find a low frequency square wave (LFSW) thousand watt ballast, this lamp can perform like a thousand watt version of the current darling of the commercial warehouse set, the 315W CMH system.
They're out there. The Horti Platinum is one, but I keep hearing rumors about it being discontinued.
However, if one can find a low frequency square wave (LFSW) thousand watt ballast, this lamp can perform like a thousand watt version of the current darling of the commercial warehouse set, the 315W CMH system.
They're out there. The Horti Platinum is one, but I keep hearing rumors about it being discontinued.
Skunk Baxter
Well-Known Member
OK, it's no secret that when the talk turns to the technical aspects of lighting, I'm completely in the dark. So forgive the stupid question, but - how is this measured and quantified? Not that I'm doubting you; I just want to know how to find the numbers and learn to read them and (possibly) understand them. At least, better than I do now. What can I read and study to learn how to understand that post, and others like it?
ttystikk
Well-Known Member
Well here's the thing; I'm not using any quantifiable data, I'm engaging in educated conjecture. But the bread crumbs are here for anyone to follow; 860W CDM Allstart is the same tech as the lamp in 315W CMH lights. Both require low frequency ballasts. The 860W lamp happily runs at 1000W on a magnetic ballast. I have a friend who is testing the 860W Allstart on a Horti Platinum low frequency square wave thousand watt ballast and according to him, it's working 'brilliantly'. What's left is to run the two ballasts head to head on the same lamp, in the same test rig with an apogee light meter. I don't have such equipment, but I see no reason to suspect that the 860W CDM run at 1000W on a LFSW ballast won't perform like the 315W CMH lights.
Resinhound
Well-Known Member
Hey good news found a 100watt industrial UVB led fixture and its only $45,167.00.Im a liiiitttle short right now...
ttystikk
Well-Known Member
Ooooo! Put up the link!
whitebb2727
Well-Known Member
Thinking of reverse engineering it and selling them a little cheaper?
ttystikk
Well-Known Member
You know it, home slice! I bet I can get them down to under $40k!Thinking of reverse engineering it and selling them a little cheaper?
Skunk Baxter
Well-Known Member
I'll take your educated conjecture over a lot of people's quantifiable data any day of the week. There's an awful lot about the way I grow weed that I can't quantify either, but when Week 10 or Week 12 or Week Whatever rolls around, the weight is there. And I can even explain how I did it, but I can't write it down and teach someone else how to do the same thing and achieve the same results.
Thanks again for the info. I'm going to be really interested in seeing how this progresses for you. I don't know anywhere near as much about this as you do, but on a gut level I know that where you're going with this is exactly where I sense that the future lies.
whitebb2727
Well-Known Member
Zoomed and other companies make UV led hoods for reptiles for less than $200.
Punch in uvb led and all kinds of stuff comes up. There are some companies making stuff for uvb. There are uvb screw in led bulbs.