HELP! what is this?

[genghishan]

hello there

this girl is 2-3 week old ,my ph is 6.50-7 between. ı use terra professional for soil and led light.humidity level is avarege 45 50%.

ı dont know what is cause. is it important or what ?
thank you everybody

 

[Canuck147]

Your plants are a very light green color - could be calcium/magnesium deficiency. Or - it could be what is inside your soil.

 

[duckman]

kinda hard to tell from that angle but is it possible she's outgrown the pot?