UV A And UV B In Late Flower

Dr. Who

Dr. Who

Well-Known Member
DankaDank said:
That’s a bit of a generalization, but yes I do agree with you from the research I’ve done the Agromax does seem to be the better option (its puts out more uw/cm2 than the Reptisun and Arcadia) ,however I am perfectly happy with my 18 inch penetration as that's where most of the prime buds are. Its also worth noting that most reptile bulbs are still superior to the current led uv's. Another important factor that is being neglected is not just the intensity and spectra the light outputs but also the milliwatt maintenance of how fast, and to what amount the efficiency decreases over time.
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The weak one's are designed that way to "protect humans" .....Most likely by request of the companies legal dept!

You should look at 400w Merc vapor bulbs......Yes they have "safety" glass but the high output from the Merc Vapors have UV warnings right on the package about how you STILL need to limit exposure do to that...

I used them like 6 years ago and had some interesting results......Very strong!

I see your point but, still rather inclined to higher cleaner outputs for deeper penetrations. I need better then 18" to cover most of my mains.
 
Dr. Who

Dr. Who

Well-Known Member
My little pending "vacation" (looks as though it could be 60< days) has me prepping for reduced runs, with more focus on quality and efficiency......I have drug out 4-6 bank and 2-8 bank T-5 units and am planing on dialing in some RM3 style ops alongside 1K dual arc's and an 820CDM with the sq wave Phantom ballast as you @ttystikk mentioned earlier.....Bulbs have been ordered...

Might as well go back to testing and research, as I'll have the time. Wife says I should take the visit offer up from Riddle too......Not a bad idea as I have friends in C. Springs and Canyon City I would like to see too! No real plans on that yet..
 
DankaDank

DankaDank

Well-Known Member
Dr. Who said:
The weak one's are designed that way to "protect humans" .....Most likely by request of the companies legal dept!
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Another problem is that back in the early 2000's a lot of reptiles were being blinded by the reptile uv's because there were too intense, so they had to decrease the output. Uv is definitely to be used in moderation (imo kinda a less is more situation) it's also nice to try even out the uv light spread without having one powerful light.
 
Dr. Who

Dr. Who

Well-Known Member
DankaDank said:
Another problem is that back in the early 2000's a lot of reptiles were being blinded by the reptile uv's because there were too intense, so they had to decrease the output. Uv is definitely to be used in moderation (imo kinda a less is more situation) it's also nice to try even out the uv light spread without having one powerful light.
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And I found that out quick with the Merc vapors! Limited on time spread though out the day was needed for that....The use of light movers worked some too...
Very intrigued with the new T-5 bulbs...So much so that remembering my old results, time to try the new tech! The "intensity" of the buzz was just so damn good/intoxicating.....It was simply not worth the work on my old scale.....Now I have a nice place to play with things like that...

Nice chat Danka
 
bravedave

bravedave

Well-Known Member
mr sunshine said:
Thank you Dave that's very thoughtful of you. Did uv light increase potency for you?
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I think so. Had a super crop. The blues certainly helped the HPS in the frost area. Broke my yield record. Had one plant foxtail a bit but just the largest cola.
Have run a new MH this grow (just retired one with that had 5 grows on it, 3 where it was used end-to-end) that I am running till the stretch is over and then I add the t5 blues again while I am debating whether to switch in the HPS again or just leave the MH humming and see how that flys. Right now I am leaning HPS, finishing with MH the last couple weeks. Thinking of picking up the 600w "Finisher" Current canopy is best yet.
Thx 4 askin.
 
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mr sunshine

mr sunshine

Well-Known Member
bravedave said:
I think so. Had a super crop. The blues certainly helped the HPS in the frost area. Broke my yield record. Had one plant foxtail a bit but just the largest cola.
Have run a new MH this grow (just retired one with that had 5 grows on it, 3 where it was used end-to-end) that I am running till the stretch is over and then I add the t5 blues again while I am debating whether to switch in the HPS again or just leave the MH humming and see how that flys. Right now I am leaning HPS, finishing with MH the last couple weeks. Thinking of picking up the 600w "Finisher" Current canopy is best yet.
Thx 4 askin.
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If you do switch, buy a De fixture....
 
testiclees

testiclees

Well-Known Member
This is that same Sin Mint Cookies @ 13 days 12/12.. I'm still using the hortilux with the 3500 and 4k. Ive got a 730 (lights out) rig on my fixture. I was hoping for a quicker response to lights out and possibly a quicker flowering response.. So far it doesn't look that way.

I plan to keep a 12/12 schedule until all plants are solidly in flower. Then, I'm gonna go 13.5-10.5 for a few weeks relying on the 730nm to extend the lights-on period a bit.

The plant flourished under this light combo. At first i overexposed the leaves because the t5 was too close. I think the damage seen in pics is too much irradiance. I backed the whole fixture off and had better success. My room is very bright. ~1200ppfd

Around week 5, I expect to switch to the Agromax UVB/A bulb.
 

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whitebb2727

whitebb2727

Well-Known Member
I can't say for sure but I've noticed a difference in growth with the uva bulbs. On a side note I started my tomatoes under a spare t5 with a couple of the 10,000k +uva bulbs in it. I was able to take them from under the light and straight into direct sun with no hardening off.

IMG_20160418_191923908_HDR.jpg IMG_20160419_122552807.jpg
 
ttystikk

ttystikk

Well-Known Member
whitebb2727 said:
I can't say for sure but I've noticed a difference in growth with the uva bulbs. On a side note I started my tomatoes under a spare t5 with a couple of the 10,000k +uva bulbs in it. I was able to take them from under the light and straight into direct sun with no hardening off.

View attachment 3660816 View attachment 3660821
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That not needing to harden the plants off to sunlight is a fascinating bit of info.
 
whitebb2727

whitebb2727

Well-Known Member
testiclees said:
This is that same Sin Mint Cookies @ 13 days 12/12.. I'm still using the hortilux with the 3500 and 4k. Ive got a 730 (lights out) rig on my fixture. I was hoping for a quicker response to lights out and possibly a quicker flowering response.. So far it doesn't look that way.

I plan to keep a 12/12 schedule until all plants are solidly in flower. Then, I'm gonna go 13.5-10.5 for a few weeks relying on the 730nm to extend the lights-on period a bit.

The plant flourished under this light combo. At first i overexposed the leaves because the t5 was too close. I think the damage seen in pics is too much irradiance. I backed the whole fixture off and had better success. My room is very bright. ~1200ppfd

Around week 5, I expect to switch to the Agromax UVB/A bulb.
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When I see people say they run t5 within a couple of inches of the canopy they either never run a t5 and saying they have, used a one or two bulb fixture or it is not high output.

My eight bulb ho will fry some plants if I get closer than about eight inches.

ttystikk said:
That not needing to harden the plants off to sunlight is a fascinating bit of info.
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I would think the uva/uvb bulb would be better for that reason. Also that later in the year with a harsher sun I don't know. I will try with a plant or two and see the outcome.
 
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