Got a reddish/purple tint

My plant's stem's gettin' a tint, ill post pics.
also, any advice on how to get the lower leaves from droopin' like they are? i think its from the light not gettin' thru, i'v got bout 7,000 lumes runnin' through a sq/foot, and i hear that's not quite enough...


http://i163.photobucket.com/albums/t283/csteph01/0818092314-1.jpg

& the two plants :leaf:
http://i163.photobucket.com/albums/t283/csteph01/0818092310.jpg
years of growing....but never seen purple stems and dont know if 7000 is enough...hmmmm
7000 is plenty
and if its not in the genetics then it may be a N or P def
 
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