Extra uva light with quantum board

If it falls in the "ePAR" wavelength range, it's probably useful and backed with real data to support it. If it's just UV to damage the plant and cause a response, this is not proven to be a real effect with any confidence. If it does work, you don't want this on the entire light cycle. it is meant to cause some minimal damage and the healing response needs to out-weigh that damage. This is reference material like googling sunrise/sunset. If it's not in the "ePAR" range, it's likely a gimmick and/or little to no evidence to support its use. AKA an "e-peen"

Those 395nm-400nm chips are producing UVA light waves. The frequency of those diodes isn't harmful to the plant, However, will UVA light do what you're hoping? No ... as mentioned in the previous answer, it has very little noticeable effect on the quality of the finished buds. That frequency isn't going to stimulate resin production. If you're looking to try to increase resin and potentially unlock a few more percentage points in resin production, look for UVB light in the 285nm-310nm wavelength. California Light Works and Migro both offer a florescent light that produces these wavelength. Reptile lights also offer UVB light production. I own a couple of the CLW versions and I have used them in several grows. Even with UVB, my flowers had no noticeable difference when using the traditional toke test. A laboratory test might show some minor differences. On the other side of the light spectrum, deep red (660nm-ish) and far red (730-745nm-ish) used 15 minutes before lights on and 15 minutes after lights off has produced a larger yield of heavily frosted flowers than UV light for me. Google "Emerson Effect on cannabis" for more information.

I doubt it.Its roughly around 600w per square metre so I doubt it.Theres a free app for your phone.PPFD Metre so you can measure the umol.UV and IR are onlky to be used for a short amount of time at the end of each day so google it.Some tests show it does nothing and the ones that show it improves show minor improvement,I have them on 1 of my lights and never noticed any difference from the plants under a different light.