COB help, first build (temperature selection)

hey fellas and felladies. iv recently started looking into doing a diy cob led with the citizen clu058 1825 @ 1400ma and was curious when selecting temperatures. iv always been under the impression that 2700k is a good color spectrum for flowering. does the citizen clu058 1825 80cri in 2700k ran at 1400ma fall under the 570nm? and seem to be a decent spectrum? because its base efficiency is 2250ma divided by 1400ma im driving at, multiplied by 100 giving me 62% efficiency i think it does but im also VERY new at this

Efficiency is not linear so you can't use that formula to obtain it. On the other hand, you can find it in the excel spreadsheet on the manufacturers website.

Regarding the temperature, most people use 3500k for the whole grow. I am planning to use 3000k 90 CRI for my flower tent.