Epic 4x4 Flowering Smackdown : 96 Elites vs 288s
- Thread starter Or_Gro
- Start date
mr. childs
Well-Known Member
cant believe i missed all of this. great work.
are you thinking about hortilux's far red t5 in alternating weeks with the uvb?
are you thinking about hortilux's far red t5 in alternating weeks with the uvb?
Or_Gro
Well-Known Member
Welcome back.
Not sure what alternating weeks does, once the 288 vs 96 clones go thru stretch, they will be under 4’ growbright fr bar everyday full lightson plus first 15 min of lightsoff.
The clone mothers went under 3 rapidled fr pucks yesterday, day 22 since flip.
The 288 vs 96 smackdown clones have been under uva/b since the mothers were seedlings, will continue thru harvest. Only questions are: how high, how intense: how long/day....
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Or_Gro
Well-Known Member
Day 23 from cloner: Finished removing basal fans from lower nodes, to focus energy on new mains, now that they have their new leaves.
Seeing some uv damage (curling new leaves) after going to 44 mins/day, 50:50 bod:eod.
Backing up to 36 mins, for few days, then reevaluating.
Just want to reiterate to anyone following uvb, costs/bens of this for cannabis is experimental, and can do major damage if you aren’t on top of it.
@Randomblame recently told me he is seeing damage in flowering (including melted trich caps) from exposure exceeding 1 hour per day @ estimated 170uW/cm sq.
Be careful out there...
Or_Gro
Well-Known Member
Brock_Fawkin_Samson
Active Member
What's the sun measure at it's lowest μw/cm^2 reading thoughout the day? I'd shoot for that μw/cm^2 (entirety of lights on) and start from seed instead of trying to catch up later?
Good work on the grow, I've been liking and watching, keep it up!
Good work on the grow, I've been liking and watching, keep it up!
Or_Gro
Well-Known Member
Thanks!
Uvb is near zero, unless you’re way above sea level...
(Uvb, uW/sq cm, 400’ elevation, oregon 9:08am, today)
this whole concept originated from observations in the hindu kush., and is used successfully for increasing extractives in certain food crops...
Imo, w due respect, you want to mimic the sun, grow outdoors...it’s not the point when growing indoors...
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Brock_Fawkin_Samson
Active Member
It would just give you a known level of UVB that they can genetically handle (to start with).
And there's definitely more UVB than zero at low altitudes, people get sunburn at the beach too.
UVC gets blocked out and much of UVB but even then it's much more intense than a reptile bulb half the recommended basking distance. Depending on strain you could figure UVB readings in the Hindu kush (25000ft) for your indica preliminary starting point and UVB readings for south african elevation (up to 10000ft) for your sativa strains. MJ gets all the UVB the sun can muster and does fine as a seedling.
I was just trying to point out a correlation that's seems to be often overlooked when discussing UVB doseage.
Enjoying the grow so far
Or_Gro
Well-Known Member
Hey @SMT69 , just for you...trainwreck babe you were winkin at, 22 days from flip.
Smellin like a tropical fruit market...maybe down your way...
Back one is the big one, front one is a sister from another seed...quick conclusion is they are diff phenos, but idk, cuz of the gyrations i had to go through when electrician killed my first set of clones...
Anyway, the likely suspect for the lovely bouquet is the big one, about a week ahead of all the other girls (4 diff strains) in tent:
(Uvb ended when the mothers were no longer needed for clones, ie at 12:12)
Smellin like a tropical fruit market...maybe down your way...
Back one is the big one, front one is a sister from another seed...quick conclusion is they are diff phenos, but idk, cuz of the gyrations i had to go through when electrician killed my first set of clones...
Anyway, the likely suspect for the lovely bouquet is the big one, about a week ahead of all the other girls (4 diff strains) in tent:
(Uvb ended when the mothers were no longer needed for clones, ie at 12:12)
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Or_Gro
Well-Known Member
Thanks again!It would just give you a known level of UVB that they can genetically handle (to start with).
And there's definitely more UVB than zero at low altitudes, people get sunburn at the beach too.
Depending on strain you could figure UVB readings in the Hindu kush (25000ft) for your indica preliminary starting point and UVB readings for south african elevation (up to 10000ft) for your sativa strains. MJ gets all the UVB the sun can muster and does fine as a seedling.
I was just trying to point out a correlation that's seems to be often overlooked when discussing UVB doseage.
Enjoying the grow so far
I specified relevant sample info...one sample does not a t-, f-, or other distribution make...
Yes lots of caveats: location, angle of sun, cloud cover, reflectivity of surroundings...
But bottom line is that mimicking the sun is a logic pathway frought with deadends when growing indoors...
if uvb were so easy to deal with people like @Randomblame would have already nailed it...
What schedule, duration, intensity, equipment do you propose when using uvb for growing in a tent?
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Or_Gro
Well-Known Member
Day 25 from cloner: All mains survived the tiedown, tightened them this morning, expect to do final topping later this week, train the resulting 8 mains, and go vertical to 12-14” flowering height in next 2 weeks. Aggressive schedule for 18:6, but these lights may be up to it...
Some yuge fans, and tight, tight nodes...can’t get enuff of these 96s.
Uvb at 36 mins/day (~100+ uW/cm sq) and holding for now...uvb is just one small part of this grow, seeing tip leaves overdosing...backed off to this level...not gonna push them further until flowering.
Some yuge fans, and tight, tight nodes...can’t get enuff of these 96s.
Uvb at 36 mins/day (~100+ uW/cm sq) and holding for now...uvb is just one small part of this grow, seeing tip leaves overdosing...backed off to this level...not gonna push them further until flowering.
Or_Gro
Well-Known Member
Fyi for those interested in uv, per @Randomblame on a diff thread
The spectrum of these agromax bulbs is much different to the natural UV spectrum.
The green line is the natural UVA/B level in the UK and as you can see there is almost no UVB below 300nm. Its filtered by the atmosphere. The higher we go the more the green line shifts to the left side and the amount of UVB gets higher and goes deeper into the UVB range(closer to UVC). At some point (+1000m) the spectrum contains enough UVB in the region that responds to the UVR8 molecule but only a very small part falls in this area.(286nm triggers UVR
I can not put them on top of each other but you can see that the Agromax spectrum already claws at the 275nm mark and has much more UVB in the 280-300nm range than normal sunlight. If we consider only 280-300nm to be the required wavelength it takes only a fraction of the time to reach the same dose with such a bulb.
The dose below 300nm is for sure much higher then natural (maybe 4000 or 5000m level) and this is for sure stress pure.
I don't know which light was used in the pdf about UVB but they have for sure not used an Agromax tube.
The blue line in the 1st screenie is the Arcadia D3dessert and I see only very little output below 290 and 300nm and no light in 280nm. But these 10nm seem to have the potential to cause much more stress.
The spectrum of these agromax bulbs is much different to the natural UV spectrum.
The green line is the natural UVA/B level in the UK and as you can see there is almost no UVB below 300nm. Its filtered by the atmosphere. The higher we go the more the green line shifts to the left side and the amount of UVB gets higher and goes deeper into the UVB range(closer to UVC). At some point (+1000m) the spectrum contains enough UVB in the region that responds to the UVR8 molecule but only a very small part falls in this area.(286nm triggers UVR
I can not put them on top of each other but you can see that the Agromax spectrum already claws at the 275nm mark and has much more UVB in the 280-300nm range than normal sunlight. If we consider only 280-300nm to be the required wavelength it takes only a fraction of the time to reach the same dose with such a bulb.
The dose below 300nm is for sure much higher then natural (maybe 4000 or 5000m level) and this is for sure stress pure.
I don't know which light was used in the pdf about UVB but they have for sure not used an Agromax tube.
The blue line in the 1st screenie is the Arcadia D3dessert and I see only very little output below 290 and 300nm and no light in 280nm. But these 10nm seem to have the potential to cause much more stress.
mr. childs
Well-Known Member
all of the above are my reasons for using the 2ft in a 4x4. that 4ft bulb is a killer, and to think htg once had an agromax bulb that was 100% uvb not 75%uvb 25%uvaFyi for those interested in uv, per @Randomblame on a diff thread
The spectrum of these agromax bulbs is much different to the natural UV spectrum.
The green line is the natural UVA/B level in the UK and as you can see there is almost no UVB below 300nm. Its filtered by the atmosphere. The higher we go the more the green line shifts to the left side and the amount of UVB gets higher and goes deeper into the UVB range(closer to UVC). At some point (+1000m) the spectrum contains enough UVB in the region that responds to the UVR8 molecule but only a very small part falls in this area.(286nm triggers UVR
View attachment 4275858
I can not put them on top of each other but you can see that the Agromax spectrum already claws at the 275nm mark and has much more UVB in the 280-300nm range than normal sunlight. If we consider only 280-300nm to be the required wavelength it takes only a fraction of the time to reach the same dose with such a bulb.
The dose below 300nm is for sure much higher then natural (maybe 4000 or 5000m level) and this is for sure stress pure.
I don't know which light was used in the pdf about UVB but they have for sure not used an Agromax tube.
The blue line in the 1st screenie is the Arcadia D3dessert and I see only very little output below 290 and 300nm and no light in 280nm. But these 10nm seem to have the potential to cause much more stress.
View attachment 4275859
mr. childs
Well-Known Member
i used to use the agro uvb one week than a agro blue the next week following it up, hoping to help the recovery from a week straight of uvb. not i alternate with the horti red 660nm & uvb.
Or_Gro
Well-Known Member
Logic? 660 promotes photosynthesis, which heals damage?
There is a lot of 660 from these 96s (huge blue too), 18 hrs everyday...
How would you work that? Uv every other week, 96s on regular schedule?
What happens when plants that were on uv, are shut off from it every other week? They maintain current level of resistance or have to start lower/over again? They keep putting on new leaves; one week later the top leaf sets haven’t had uvb, then you hit them with uvb?
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