First Grow: Will my babies be ok? [pics]

• She's just recovering from overwatering and nute def. ... She's been growing but now i see a purpleish outline on the leaves. I have a 2 week old seedling as well with the same purpling around the leaves. Can it be light burn? They're under a 600 watt mh Attachment 2145475Attachment 2145476Attachment 2145477Attachment 2145478Attachment 2145479Attachment 2145482Attachment 2145483Attachment 2145484Attachment 2145485Attachment 2145486Attachment 2145487Attachment 2145488Attachment 2145489Attachment 2145490
  

  
  

Originally Posted by ant1408

pics dont work but the purpleing is your plant turning colors because it gets cold at night or its just a purple strain

Ohhhhhh ok yea it does get in low 60's at night. thanks man