Nope, they are around day 55 or so. Do you remember the 5 girls I have shown a few weeks ago? SSH, BlueDream, ColumbianGold and 2 own BD crosses? That's these 5 ladies.
I first had two nodes with branches left on each plant and last week I removed the bottom ones to have 4 clone of each plant. They are currently in the cloner and need another week.
After this test I will keep only one or two genetics to work with.
I have by the way calculated how much kJ/m²/h you get from 1μW/cm². 1μW/cm² UVB means you get a dose of 0,036kJ/m²/h.
This way you can use your device measurments and simply multiplicate the readings by 0,036.
The way how I figured this out is pretty easy to understand...
When 1w is 1Joule than 1w/cm²/s is 1J/cm²/s, converting to μW is the next step.
1μW/cm²/s is 1J divided by 1million so 0,000001J/cm²/s, next step is how much is it per hour.
0,000001J/cm²/s x 3600sec(1hour) = 0,0036J/cm²/s. Now convert it for m²..
0,0036J/cm²/s multiplicated by 10.000cm² = 36J/m²/h, and now for kJ...
36J/m²/h divided by 1000 is 0,036kJ/m²/h.
So from 1μW/cm² you'll get 0,036kJ/m² UVB every hour.
At two ft. distance we should have 170μW/cm²/s with reflector so one hour would be a dose of 6,12kJ/m²/h. The UVB pdf says they've used 6,7 and 13,4kJ/m² and found linear increase in thc. This means you need only a little more than 2h with the Agromax bulbs at 2ft distance to get the same dose. I will try to give them at least 3h the day or ~20kJ/m² when compltely used to it.
I've use much more already with the reptile bulbs but their UVB ends just below 300nm. Agromax and Flowerpower bulbs go as deep as 280 or maybe 275nm(pretty hard to figure out with the Agromax spectrum chart) and this can make a huge difference. The lower the wavelength the more damage.
This could be the reason why these bulbs are more stressful.
I've used at least 120μW from reptile bulbs(1ft distance) for the whole 12h and this would be a dose of 51,84kJ/m². Almost 4 times as much like 13,4kJ and got no damage or stress symtomes beside slightly curling leaves in the first week.
This ladies got another day with 5+5 minutes UVB, 30klx intensity at canopy level, 270w and ~3ft distance. I can see no damage till now. One plant(front left) had a slight magnesium deficit but its already fixed and new growth is healthy. I have only the feeling the leaf margins are slightly curled upwards but only a very little till now.
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