IInd International Piano Festival in Scotland, U.K

This remarkable feature of LED luminaires is to understand the cause analysis later. First of all, the reason that the LED lamps still emit low light after the power is turned off is caused by the lighting switch being controlled to the neutral line (normally prescribed as the hot line), which accounts for about half of the causes of this phenomenon! When the lighting switch controls the neutral wire instead of the hot wire LED flood lights

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