Hard to say but your orig setup had more of a "balanced" spectrum which you now shifted to heavy blue w/ a shortage of deep red.Hi all
I have a clone of ADA 60P tank runing with 12 cree XTE LEDS at 1.5A with 45 degree lenses and at height of 14 inch ( 35 CM )
setup was 12 cree XTE LEDS : 6x cool white 6500 - 3x Warm white 3000k - 3x nature white 4000k
and everything was great and i had a nice plant growth and someday i decided to change the 3x nature white to cool white i just like the cooler look, but now my plants are not growing the same that was with the nature white specially the Pygmy Chain Sword it was growing like a weed
so from your experience is the Cool white XTE are not enough for the plant growth or i may have something wrong with my tank ?
it is low tech shrimp tank with no fertz or co2
photo period : 8 hours
plants: xmas moss , anubias nana , brown crypt ,Pygmy Chain Sword
Mentally combine these together..add more of the blue (2:1 ratio) now think of the just blue line w/ a little of the red line(which is what you currently have)
That said you also could be out of "food".........
Err.. rereding your post (and too lazy to delete).. you kept the WW's.... shouldn't have changed enough in spectrum to be an issue..so it is probably food.. (CO2 n/ nutrients)