...hmmm, maybe, or P defc., symptoms not defined well enough to diagnose for sure,... P defc. can also cause that color burnishing, but LSD-25 does carry natural color to her too,... spotting could be early ca defc., common at this stage, and especially with LED's,... I say boost up the P and Ca, and see what several days shows,.... Oh-- what are you growing in, and do you have some pH data for us? We need to confirm this is ither a defc by lack-of, or an off-pH lockout, in which case adding more nutes will make matters worse, likely,...