You are using magical crops but you want your farm to be magic-free.
I used magical crops in the beginning, but only corn, tomatoes, etc I never got into the whole essence stuff since the only way to harvest corn and things seem to only be by thaumcraft golems. In the later pictures I'm basically only harvesting vanilla crops and growthcraft crops[DOUBLEPOST=1411479204][/DOUBLEPOST]
if you've thaumcraft, I'd go with arcane lamps hidden underground, or above ground if you like the way they look
they can light up quite a large area pretty well
I might do that but I'm trying to keep it magic free