Need help with UV-A and far red

manbird

Member
Hello everyone!

I have been reading a lot about UV supplemental lighting and the use of far red for EndOfDay lightning and for utilizing the Emerson effect.
As I am upgrading my micro grow right now, I want to experiment with UV and farred.
After doing my research I still have some questions regarding my very limited space.

The space I have available is 20x8x25inches (length, width, height).
As of right now I have two Cree cxa2520 3500k COBs at 800mA and a dying DIY panel with osram golden dragons.
I want to reuse the constant current PSU from the DIY panel which has 60W@700mA.

Because of the small width I will use osram oslon ssl with an 80degree beam angle.
With 5x deepblue (460nm) and 15x red (660nm) I think the ratio between red and blue should be good enough for flowering.
As I only have such a limited hight I am not sure if one or two nichia NCSU275 with either 395nm or 405nm is too much,
with a distance of about 5inches between the lights and plants.

My Questions now are:
-Should I use some Osram Oslon SSL far red leds for utilizing the emerson effect or is my setup already overkill enough and only use far red for end of day treatment?
-How many watts of far red should I use for the emerson offect or for end of day treatment?
-Is it possible to notice UV damage with such a small wattage of UV light?
-Is less than a Watt of UV-A even enough to make a difference if I turn them on during the last few weeks of flowering of about 4hours a day?
-Should I change the ratio between red and blue leds regarding the use of UV and farred?

I am really thankful for any input on my planned setup.

-manbird
 
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