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Question:

LED dual-mode folding desk lamp on external what meaning be

LED dual-mode folding desk lamp on external what meaning be

Answer:

LED desk lamp with ac plug, directly into the 220 volts alternating current (ac) above, turn on the switch, the lamp light, this is a built-in power supply. Accordingly, it is often said that the exchange desk lamp.
LED desk lamp, driving power and desk lamp is divided in two, the vast majority of dc lamp, socket is a circle with a small stick of that kind of, need with the corresponding hollow plug connected to a dc power supply. When you need to use, will drive the dc output of the power plug into the desk lamp of light, and then open the power switch, the lamp light, bright, that's the beauty of dc lamp, this is the external power supply.
Dual mode, it is to point to can use ac and dc two modes of desk lamp power supply. Both external and internal, and ultimately to the LED lamp bead above, must be dc power supply.

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