What does "class 2 input only" means in my LED desk lamp? Is it the power supply? And is it the same as class II (can I use a power supply that is class II)?


2 Answers 2


You're correct that "input" means the power source. "Class 2" and "Class II" are different, however. The former refers to wire size and other specifications, and the latter refers to the insulation (shock protection) standard of the device.

More on that

  • and how can i find my power supply which class it have?(the wire thing?)
    – Yazan
    Sep 2, 2020 at 14:14
  • I assume it would be on the label.
    – isherwood
    Sep 2, 2020 at 14:15
  • poweradapter.co/… is this power supply class 2?
    – Yazan
    Sep 2, 2020 at 14:21
  • I can't tell. Not everything with the Made in China seal will have standardized NEC markings. It should actually say "Class 2" somewhere.
    – isherwood
    Sep 2, 2020 at 14:26

You need to find the power supply that has the correct voltage and wattage. For example the Output will usually be limited and the wattage specified as 25-30 volts at 9 watts is one I have. They are usually double insulated and power limited (considered safe not a fire hazard).

Look on the “brick” or plastic block. It will have the voltage and wattage stamped into it. Led drivers usually have a range of voltage at a specific wattage. Power supplies for computers have a specific voltage and the maximum current they can supply.

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