LED lamp
frequency of 50 Hz sucked up to 40,000 to 55,000 Hz, and the corresponding lamp will flicker frequency per second significant decline, and some can even drop to zero, thus helping protect the visual function. However, there are a lot of lighting market in the Eye of the quality of the brand, but related, Eye of the radio frequency internal quality requirements can not meet the requirements of more than 40,000 Hz.
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10/22 10:09