Randomblame
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...
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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.
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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.