The house that new clothes builds, pick up a LED lamp Specific parameter no receive wire didn't receive zero after electrify LED lights have a dim light An estimated 10% of the after less than fully open after disconnect all electrical appliances There are light which out of the question to solve the trouble is online, etc. ~
LED lamp belongs to low pressure constant current electric equipment, want to use the power adapter when ac 220 v power supply to drive. Now the high frequency switch power supply, LED power supply is almost working frequency is controlled in 100 KHZ, input and output impedance is very high, start up easily. When turn on the fire didn't answer the zero line, power shell or internal circuit board is exposed to air, larger area to form a minor loop and outward radiation energy, cause the power weak vibration, low output voltage. This phenomenon is not obvious when the air is dry. Therefore, in order to use electricity safety and environmental protection, use LED lamps and lanterns is best according to the standard connection, namely switch must control the fire. Of course, there are still many LED lights manufacturer in order to reduce costs, using a simple capacitor step-down type power supply for the LED power supply. Because the source is a capacitive load, even after the switch wire through line can the distributed capacitance between the conduction small current, lead to LED lights dim.
Didn't answer the zero line bright? The same way. I made a 4 watts of the led, power supply is finished product power supply, will dim light when the power is switch received a zero line on the (estimates). Should be to alternating current (ac) by the rectifier filter circuit of small discharge, cause of capacitor on the voltage circuit work. '
Wire and zero line through a switch or increase the LED by the series resistance tolerance
Each led lamp bead, voltage is only about 3 v, you put some static will dim, so is the problem of voltage
