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I wound up cannibalizing a bridge rectifier from some old electronics and making an a/c to d/c adapter so I could do close up photography. I labeled it "lights only! 120v d/c" but I'm also the only person with access to it.
You are playing with fire. Except more dangerous. You have zero reason to be using such high DC voltage for photography.
It's 120v DC into an led light designed for 120v a/c there's no difference other than no flickering.