That's why I hate everything but incandescent lights. Fluorescent and LED all buzz because they need some kind of transformer. Usually a cheap-ass crappy one, because good transformers cost more than people usually expect to pay for a light bulb.
There's always the option of using 12v DC LED's in series, and then power them all via one good-quality transformer. (the same system that is used for halogen spots) Or use a micro transformer of good quality per light, but then you need adequate space behind the ceiling to tuck it away.
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