They don't flicker unless I put a heavy load on the circuit. My LED lights draw about 0.023A, which is not enough for them to work. They just lay there. But if I added an incandescent bulb to the output in parallel with my LEDs, they would blink. They may work with some higher current LEDs, but they won't work with all LEDs. You must indicate current needs in the description. I had to order something else. These didn't help me.
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