Adding UV

[Drownomatic]

@Talonxracer Thats quite a setup, but it looks tidy.

Is your turntable level, or did you angle it for better side light? I've thought about rotating bases.

 

[Talonxracer]

@Talonxracer Thats quite a setup, but it looks tidy.

Is your turntable level, or did you angle it for better side light? I've thought about rotating bases.

Sorry I didn't reply sooner, must have missed your question. My turntable is level, it works great to give the whole plant a more balanced diet of light. My first grow with the uva/b led's had the uv led's arranged along the side of the quantum board and I had a little more sunburn on the plant than I wanted, so on the second grow I placed them up higher in a vertical corner of the tent.

From what I have read in various research papers the entire plant doesn't need exposure to uvb to activate the uvr8 protein.

 

[Drownomatic]

I've read that too, I wonder how little area needs to be exposed.

If a small area is enough, a single LED could be clipped to a leaf.

 

[Talonxracer]

I am running just 2 uvb(285nm) leds, and they need to be at least 16" from the plant at 60% for 20 minutes to keep from a serious case of uvb burn occurring.