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Direct from the wall
I believe you can preclude the need for a transformer if the combined voltage of your elements in series adds up to the total operating voltage but you will still need an SCR. As in: if your primary voltage is 220 and each element is rated at 12 volts you would need in the neighborhood of 18 elements. There is in this case and economy of scale but that scale is usually beyond the scale of the studio.
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