A full autopsy of a generic plug-in nightlight. I was kinda expecting it to have a little capacitive dropper inside, but it has a minimalist half-wave resistive dropper and the light sensor is basically a transistor shunting the LEDs during the day!
It works, so I guess that's what matters. And even with it's less than efficient design, it probably draws less overall than the older tungsten style.

14 thoughts on “Teardown of an led plug-in night light.”
  1. Avataaar/Circle Created with python_avatars dave c says:

    just ordered 2 of these close to them different brand prob same build lol and u know im watch your video on them !00% thanks for sharing

  2. Avataaar/Circle Created with python_avatars John Sailor Secret in Distress says:

    Bought some of those but the light don't turn on no more after a couple months of use. No switch button. Its sensor light. Didn't know you have to open them

  3. Avataaar/Circle Created with python_avatars Eliz Sanz says:

    How does it turn on though? I plugged them in all my sockets and they didnโ€™t turn on.

  4. Avataaar/Circle Created with python_avatars Justin says:

    Wouldnโ€™t the resistors only be dissipating 1/2 watt since they are two 12k in series? Each is only dropping 120V.

  5. Avataaar/Circle Created with python_avatars Acme Fixer says:

    I was disappointed to find that mine, just like yours, draws more current when off. They deceive the consumer by making him believe he's saving $$ when the LEDs are off! Nasty! So I removed the CdS photocell and it now stays lit 24/7 but draws less power. This is typical of cheap nasty Wal-Mart merchandise.

  6. Avataaar/Circle Created with python_avatars bestamerica says:

    '
    i have one color LED plugin nite lite

  7. Avataaar/Circle Created with python_avatars bestamerica says:

    '

    pretty nice plug in night light with LED on this video…

    how come america dont like to makeing their own plug in night light with LED

  8. Avataaar/Circle Created with python_avatars Hany Naeem says:

    What is the transistor value?

  9. Avataaar/Circle Created with python_avatars Peter Edin says:

    I've just watched a clip with John Ward tearing down an identical (or near identical) one. His live and neutral pins were twisted but was much cheapness at 99p.

  10. Avataaar/Circle Created with python_avatars Boyd Bros. says:

    I know this is OLD, but how would you fix this night light circuit?

  11. Avataaar/Circle Created with python_avatars jenny taylor says:

    Bugger me! You've saved my sanity with this 'how to'.
    Just bought the same light from Home Bargains for ยฃ1.50, and the instructions said nothing about removing the lower 2 screws, only the upper 1 – leaving me scratching my head and angrily pulling at the unit – which appeared to a simple, slide-off cage which wouldn't slide off. Now I don't have to take it back in order to learn how to change the bulb. (Mine's an incandescent, by the way, and gets quite hot within a few mins.) Thanks!

  12. Avataaar/Circle Created with python_avatars Harry Stevens says:

    I bought one yesterday and it as a small bulb and no LEDs at all, seems the tungsten is back in fashion, also no flickering or shimmering actually it as a nice orange glow.

  13. Avataaar/Circle Created with python_avatars mjouwbuis says:

    This light sensor design was clearly meant to be used with a capacitive dropper instead of a resistive one.

  14. Avataaar/Circle Created with python_avatars John Clavis says:

    Guest appearance by a gremlin in the last few frames of the video!

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