Deficiency or light issue

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This plant is 67 days from seed. It is Cream Mandarine in Roots Organic with Natures Living Soil. Never had anything but water. Light is Mars Hydro 700 LED, on 18 off 6. I am trying to determine if I have a nutrient deficiency or a light problem. Light is as high as it will go. In one photo you can see that leaves are turning light green on one flower and the flower right below away from light is dark green. Fan leaf looks like calmag deficient to me. You can see tips of leaves are brown. Photo with foot flower away from light does not show same symptoms.
 

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Could this be a nitrogen deficiency? Maybe phosphorus I seen some purple stems, but that could be the plants genetics,
 
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