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I like "Science & Magic" best. It gets more into theory, which is what I need. That helps me to better apply light as I'm presented with different situations.
Kent in SD
Understanding why you are doing what you are doing is different from doing it just because someone told you do it this way or that way.
Granted, sometimes practical & pragmatic can be a quicker road to producing results than understanding theory involved, but once you "understand" light (or anything really) ... it can benefit you for a lifetime in a myriad of ways.