Let me know if you have any LED questions. I have a solid understanding on them, and experience with several brands. Also 912Greenskell was telling you right. IR causes up to a %17 increase in yield. UV can cause up to %27 more THC content. Those are huge numbers for just introducing to wavelengths. The real kicker is that without UV you will not get THCV. That is a component in Haze and other equatorial based strains. It is what causes that intense trippy high. It makes the other cannabinods more potent too. You need UV to stimulate that.