The Ak47 looks like it can go 4 more weeks..
They both look mindblowing!
About UV B,
there is many writings about them on many sources since many years, i remember an old paper in an Hightimes from the 90's...
here two links if you want investigate more :
https://www.icmag.com/modules/Find_Threads/index.php?stext=UVB
http://www.cannabisculture.com/search/node?keys=UVB&x=0&y=0
i may not have my thoughts correct.
in fact, the more i think about it, i think the UV light just produces more trichs, not necessarily playing a role in them maturing.
what percentage of reds or deep reds do you think your lights put out?