Yellow Seedling

I have a seedling that is turning yellow. It is about 2 1/2 weeks old. It looks like the leaves bleached from too much light, but I am only using CFL's. Will this happen from under watering? The peat/perlite/vermiculite soil mix dries out very quickly. I have to water at LEAST every other day. If I don't water for longer than 2 days, the soil will be almost completely dry/the pot very light. This may have happened...once.

looks like a nitrogen deficiency, hows your airflow/circulation in the spot you keep her?

its doesnt look under or over watered.

that new growth from the top is lookin pretty green.

Heat stress more dark needed or move lights further from plants. Or both

or put a fan in there