I did not know this thread was here, I am probably duplicating efforts.
A quick where I am to date.
My sativa strain ignored the UVB.
The third Northern Lights is in the test room.
At 1800 microwatts UVB/cm2 the hairs burned off.
At 1100mw/cm2 the hairs burned off.
At 850 micro watts per square centimeter I have a full count of hairs, with a reddish haze in the middle
View attachment 1844218this picture is day 18.
For base line level I used Mt. Haleakala in Hawaii, 545mwUVB/cm2 during the end of May at 10,023' elevation, clear day. I decided to work top down and tripled it to start, see above.
Now that I know of this thread I will take a time out to read it completely before posting again, I am just really stoked that it exists at this point.