Northern Lights Auto

Entering preflower with 450PPF 30DLI, its still quite warm where i live so if i bump the led the temperatures rise to ~28ºc and that is no bueno. The plant looks strong overall but in the last few days started showing some signs of either nitrogen deficiency, light stress or iron deficiency, although iron deficiency seems unlikely. Kept on working on the LST and defoliated as little as possible but some work had to be done.