Yes i work with LED LMB301 in 4000k and 4000k EVO and some older cree cob 3590.
I hope but I can't be 100% sure.
Unfortunately no, I know I have to move towards 25 -30 degrees and increase the CO2 level.
I grow in DWC with Canna Aqua, PH is ~6,2 and EC 1,8 - 2,2
Yes i checked all double, no...