uv reflective paint

[subrovka]

you are welcome : ) ..been using it only for a month now on plants grown from seed, so i can´t really compare.
but i guess the difference isn´t necessarily visible. you maybe already know the paper about the effects of UV-B radiation on cannabinoid synthesis published by John Lydon in 1987, in which he states "There were no significant physiological or morphological differences among UV-B treatments in either drug- or fiber-type plants."
i think the difference is more a qualitative than a quantitative one, better say there is more THC-A in the trichs head but not more trichs in numbers.
(at least, this is what i get from the text)

 

[neverforget4/20]

Yes that makes sense. I possibly imagined a trich increase when i first tried out UVB. I'm convinced though that it had an effect on the potency.

I have read that lydon paper but since then instruments are far better and more is known about psychoactive entourage effect.

I'm hoping to make some interesting observations with the agromax bulb. I'm going to start with 4 x 10 min exposures at mid-day and evaluate from there.

Where are you with scheduling exposure?

 

[biggreg]

Unpainted PAR test.

 

[biggreg]

 

[biggreg]

Test

 

[biggreg]

Hey it worked! Posted first pic. That is the lumacept box in par test configuration

 

[subrovka]

by the way, i have to correct me: it is 0.250mW/cm^2 (not 250).

yes the paper is pretty old fashioned but in fact, today one should measure also by gas liquid chromatography, i guess.

i was going with the 13.4kJ/m^2 of UV-B from the Lydon paper.

i expose my girls 90min daily.

in the attachment you can see how i calculated the daily exp. time to achieve the 13 kJ.
actually pretty simple calculation, if the the mW/cm^2 data is given.
just to show you why i chose 90 min, i wanna make sure to "see" results you know..; )

(if your lights have .17mW/cm^2@2ft., you would need to run them 13400/1,7=130min approx. to achieve about 13kJ/m^2 daily)

greetings,

subrovka

ps. sry for hijacking biggreg, back to topic now..; )

 

[biggreg]

Unpainted box PAR test

 

[biggreg]

UVB test

 

[biggreg]

Test lid

 

[biggreg]

Test lid on PAR test all the way closed

 

[biggreg]

Behr flat white

 

[biggreg]

Had a 16"x16" sample of grow floor plus a square of their standard sized sample. This is a white reflective vinyl floor marketed to growers. I placed a 12x12 square of the material on the end wall near the bulb. I placed the rest in the corner and bottom near the bulb in the Lumicept painted box. The PAR reading dropped from 218ppf to 133 and the uv dropped to 14. I then took a piece of the material and after getting an open air reading line of sight from the reptile bulb, I placed the flooring directly behind the bulb the reading did not budge. I don't think it reflects uv.

 

[biggreg]

The paint company emailed me today. They've rebranded for our market and posted my data as a case study on their site. I will do another test of this paint when I get the grow I'm working on up and running. This stuff really is awesome paint. Blows away anything else as on the market as far as I know and has a satin finish that is cleanable! I hate flat paint.

https://www.twilightcoatings.com/pages/tetramatch-horticultural-coating