Day 13 since flip. Spots on leaves.

If not light damage, looks like a trace element sympton, which would be unlikely an dmore often caused by pH swings than physical availibility of any trace element (B in this case). easy to eliminate light damage as cause by where it is occurring and looking at the top few nodes/internodes.. if spacing is okay, it's probably not the light. If it is happening outside of teh top-most leaves, also unlikely it is the light, but a mobile nute issue would occur at the top initially, too. elminate possibilities.. take the most likely path. more info needed, and i bet you have more on hand than what is in the question.