White Widow Auto WoHoo

As I explained in my other journal i moved from a 2x4 tent to a 5x6 closet and now to a 5x10 purpose built room. If You cannot see I have a tendency to over do things sometimes.😎 I have six Autos growing all just a few days to a week apart. My first lady is growing so fast you can almost see it. the rest are not far behind. They love the Mars 3000 light. My only concern is my big plant has some yellow spots on some of the leaves. I have checked for bugs and cannot find any. Its not on any of the other plants either. Im thinking its just burns from water spots. It does not seem to affect her growing though. Any comments on what it might be is appreciated.