For finishing, whether using LEDS or HID(s)... starting at the beginning of week 6 , 2 x 4' HO ATI Coral+, or 2 x 4' HO Agromax Finisher, and for all the way through flower... 2 x 4' HO Hortilux PowerVEG FS+UV work really nice. And for me the best finisher goes to ATI, but for best all the way through flower goes to the HO Hortilux, but the best over all for me goes to using the Agromax Pure UV from week 1 of flower, at 1 minute interval per each hour @ 24 inches during each light on cycle. So that would be 12 / 1 minute UV light on cycles per hour during each 12 hour flowering light on cycle, and using 2 x 4' HO ATI Coral+ from the beginning of week 6 to harvest makes really nice buds into super sticky buds, happy me! Yeah, if you truly want to add real uv or high K wavelengths to optimize your indoor bud building during late flower, using fluro(s) are really the only way to do that at the present time. And when I said... using fluro(s) are really the only way to add uv / high K wavelengths to ones grow right now, that's because no other lighting source whether it's HID, CMH, or LED, can actually put out a uniformed array of radiating uv / high k wavelengths that fluro(s) can presently do, and they do it oh' so well.
