When it comes to LED(s), I myself have not found any LED based UV(s) that are worth a damn. I tried the HLG UV strips (2x), two very expensive LG based strips, and four Cree XPE based arrays and none of them can match the finishing results that I get use 2 X 2' agromax pure uv(s) for 30 minutes per each 12 hour cycle @ 30" above the canopy, (that's [10] three minute sessions). I run them for 3 minutes per hour starting at hour 2, and ending at hour 11. But I only use them the last 3 weeks of flower. I also use 2 x 2' ATI Coral+ lamps for the last 3 weeks of flowering. In each of my 5 x 5 tents I run 2 x 320, and (1) agromax pure uv(s) is mounted to outside of each of my 320 kits, and then I run the 2 X 2' ATI Coral+ lamps in the center between my two 320(s). Yeah, when it comes to wanting to output real UV rays, and high (k) band lighting, 10K+, to help increase trichome production, then as of today, using HOT5 fluorescent lamps are the only real option as all the LED based options just cannot compare to what HOT5 fluorescent lamps can do!
