Why are my leaves so wide?

Cedar Creek

Member
This plant is 22 days from seedling. I have it in bubble bucket with about 400ppm in nutes. It is under a 1000w MH with lights 4ft. above . With temps of 78-84 and humidity of just getting to 40% . Up til yesterday it was only 27%. I have others just like it of different strains. What is causing this? I have read that too wide of leaves are caused from high humidity but this room has been very dry and I am puzzled at why my leaves are this way.
 

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