Yellowing and burning

4 female blue cheese and 1 sour diesel that i think will be female...

here are a few pics...some of the lower leaves are getting burned really bad....Is this from lack of light??? im running 1000 watts, i know its over kill but never had burn spots this bad....the ppm is about 650 or lower on avg....on day 2 of 12/12 and its getting worse... Should i cut off all the bad leaves, i dont want to stress them out right....any ideas...

Aloha

first off, did you change nutes at same time as changing lights? this question belongs in the plant problems section. I hate to recomend antoher site but this one is really good. Sign up for it and check this page out, then remember to not give to much nitrogen in flowering https://www.icmag.com/ic/showthread.php?t=11688