Pistils browning early

[InPain]

I have two gdp clones at 4 weeks into flower. Pistils on one are prematurely browning can it be the uvb bar from California light works be the cause.

 

[ROSTERMAN]

I have two gdp clones at 4 weeks into flower. Pistils on one are prematurely browning can it be the uvb bar from California light works be the cause.

Are you running that UV at the same hrs you are other lights
I am trying to remember but I believe UV are only used in short run periods during reg/lights lights on

 

[ROSTERMAN]

Appears to be a good site for UV
https://www.happyhydro.com/blogs/news/the-truth-about-uv-light-and-your-plants

 

[longtimegrower]

Is it over fed.