Why Cheap LED Lights Keep Glowing

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There are LED lights that never quite turn off when switched off, this is their story…
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By: Mehdi Sadaghdar


  1. Sonic Best Game Extreme
    Sonic Best Game Extreme
    35 dakika önce

    Lol i have made a test that is TURNING MY TOILET LED LIGHT FOR ALMOST 5 DAYS. And no explosion but still runs GrEaT!

  2. Enrico Dell'Aquila
    Enrico Dell'Aquila
    44 dakika önce

    Probably I missed some bit of information, but [scratching my head]... isn't that with the resistance applied, the led bulb doesn't glow, but the current draw continues, so basically I'm paying an electric bill even keeping lights turned off? :) :)

  3. Shaun Childs
    Shaun Childs
    3 saatler önce

    Suggestions for efficiant type of led for a "smart home" low voltage/current lighting circuit to reduce cost?

  4. Xyber Cipher
    Xyber Cipher
    6 saatler önce

    This guy always gets shock

  5. BG Cannon
    BG Cannon
    10 saatler önce

    0.54 got me.

  6. Hellcat77
    21 saatler önce

    If you watch his video, super human endurance, (near the end)you will see he is not actually getting shocked .. lol

  7. mark hall
    mark hall
    Gün önce

    So if the light stays on is it FREE power to light LED????

  8. art. N
    art. N
    Gün önce

    Yeah.....but link

  9. matttelz
    2 gün önce

    This is the 5th video of yours that I've watched in a row and now I need to go visit my doctor for high blood pressure...

  10. HGST
    2 gün önce

    I hate the BOOM in ElectroBoom 😖

  11. Leland Green
    Leland Green
    2 gün önce

    I subscribed because of your densely packed information intermixed with hilarity.🖖😊 Then as I was watching, I thought to myself, "so all they need is a resistor of the appropriate value to fix problem?" So for those who were following you, you did an excellent explanation as well as making it fun. 🖖😎

  12. StormyMaxPerry
    2 gün önce

    Please change the "Full Bridge Rectifier" to "Full WAVE Bridge Rectifier" My name just happens to be Steve (how did you know?) and I love your channel!

  13. Theo Wild
    Theo Wild
    2 gün önce

    Watching him use his hands to connect circuits caused me physical pain. I cant tell if I love this guy or if I'm terrified of him

  14. Steve Pickett
    Steve Pickett
    2 gün önce

    very clever presentation

  15. Sherif
    2 gün önce

    So to fix this problem add a quality bulb in parallel with the cheap one? Can this bulb be far or does it have to be close?

  16. Samuel Xu
    Samuel Xu
    2 gün önce

    where di you get those light bulbs?

  17. Iotola Whohehe
    Iotola Whohehe
    2 gün önce

    Capacitance is also interesting at HV with power factor correction and the measures employed. Which also applies at appliance level for devices like fridges and such which have a big inrush surge current er? It gets rather gnarley if you add solar inverters to the equation and a lot of them watch the grid have load it doesn't see aherm.

    2 gün önce

    comedy genius

  19. Travis Turner
    Travis Turner
    2 gün önce

    Based on how many times this guy shocks himself in his videos, it's a wonder he's alive.

  20. Noah Decrock
    Noah Decrock
    3 gün önce

    Now let's make a feet rubbing powered led flash light!

  21. Kamalaveni Pkk
    Kamalaveni Pkk
    3 gün önce

    Will i get credits.... For engineering

  22. Edgar Omar
    Edgar Omar
    3 gün önce

    professional Dumbass Hahaha!

  23. Sanya Berlin
    Sanya Berlin
    3 gün önce

    dude, youre doing such a good job.. sadly i find it impossible to watch with the amount of force in your presentatition.. .. so long

    1. michael lowe
      michael lowe
      4 saatler önce

      its because hes positively charged!wahahhahaha!

  24. Chris2008
    3 gün önce

    I'm surprised that this guy is still alive.

  25. Crazy Top 10
    Crazy Top 10
    4 gün önce

    I slapped like now I want money give me

  26. lxxzacharyxxl BF1 R6
    lxxzacharyxxl BF1 R6
    4 gün önce

    Who else has said this about him.[ shave your arms and glue it to you head.]

  27. swampwiz
    4 gün önce

    Can I buy a life insurance policy on this guy?

  28. Jozef Soucik
    Jozef Soucik
    4 gün önce

    funny guy

  29. keith henry
    keith henry
    4 gün önce

    Now here is the question how can we developed this further to make our own free electricity so we can be free from the money blood suckers

  30. 0623kaboom
    4 gün önce

    the difference between making something that works and making something right that works ... in the end it boils down to cost ... the rectifier circuit costs too much for the many cheap lights made but for the bulbs it is worth it to add in ... as they charge more for them anyway .... I miss the days of making things the right way that work

  31. Steve
    4 gün önce

    I'm a Steve!

  32. Chris Newman
    Chris Newman
    4 gün önce

    At 9:22, "such circuits require a few milliamps of current to start operating, so a few microamps of leakage through the wires won't turn it on." In other words, the bulbs with the switching regulator waste at least as much (and probably more) than the ones that glow when off, but we don't see a glow, so we ignorantly feel like they are less wasteful.

  33. B F
    B F
    4 gün önce

    I don't recommend selling this guy life insurance.

  34. Aut0exec_bat
    4 gün önce

    The floor is grounded through the conductive mortar on your floor, and so are you when you sit in a metal chair. Your body did not act as a capacitor, rather a weak resistor. The more direct contact with the ground, the higher the voltage. Concrete and mortar conduct electricity poorly, but they do. This is the reason the cheap bulb didn't shock you and the cut open one did. The capacitor in the circuit limited the current. The cut open bulb connects directly to a rectifier with no reactive capacitance or resistors. With that cut open bulb, the only current limiting factor when you touch the ground wire directly is the small resistance of your body.

  35. Divus Iulius
    Divus Iulius
    4 gün önce

    Why couldn't I have had teachers like you in HS?

  36. John Klise
    John Klise
    4 gün önce

    This man is as hairy as Robin Williams and as entertaining as well.

  37. Land Rover Addict
    Land Rover Addict
    4 gün önce

    Is this happening because earth is bonded to neutral?

  38. Noneyalls Biddness
    Noneyalls Biddness
    4 gün önce

    I am an electrician. Most people joke about having a negative opinion about lawyers. It's not absolutely true that they hate all lawyers but most people have both told and heard the following joke. "A cadillac was discovered at the bottom of a lake. Inside there were two deceased lawyers. Do you know what concerned investigators the most about it? A few dozen lawyers could fit inside a Cadillac"....Or something like it. Point is (most) Electricians feel that way about engineers. This guy has to be an engineer...I mean a "professional dumbass"... however he is cool and while name isn't Steve. I subscribed to your channel bud. Great video! Odd ball, one off scenarios with communication and electrical circuits are my favorite. I've seen so much crazy shit. That my team and I adopted a few euphemisms for them...feel free to apply them to your odd ball encounters... 1) Customer has either allowed or created such a mega-mess of wires, cpe and old junk. That a complete do over is the fastest fixed. This is the Alien Abortion... 2) Basically the same one as the above but the custom won't allow you to bypass anything because he's something of an engineer. He really knows his math. This is The Engineered Bathwater Baby. Suicide is often the only option. Be safe everyone. No new nicknames

  39. BatJeff
    5 gün önce

    You are so entertaining holy crap hahaha. Subbed.

  40. wazza33racer
    5 gün önce

    best advertisement for RCD circuit breakers ever...............

  41. civicturbo2009
    5 gün önce

    WOW! you sir are great! I wish science teachers in school where as full of personalty as you! Very fun to learn with you! Subscriber gained!

  42. Fringe969
    5 gün önce

    Link for led bulbs plzzz

  43. Daniel McDavid
    Daniel McDavid
    5 gün önce

    In a proper electrical installation, the neutral is always connected and the live is being switched to the light. There could be some leakage (some dimmers can leak several mA), but it's more likely that that switch and light are not wired properly.

    1. Gadget :p
      Gadget :p
      5 gün önce

      Thank you, the comment I was looking for 👍👍👍

  44. Mike Alpha
    Mike Alpha
    5 gün önce

    5:58 this ad was perfectly placed. I didn't even fast forward past it. Well done good sir.

  45. Eric Tay
    Eric Tay
    5 gün önce

    Hey you're still alive! 😂 OK I'll subscribe now... Didnt think you'd make it past the first year so I didn't subscribe when you first came on TR-center. 😅

  46. Maximilian Cooke
    Maximilian Cooke
    5 gün önce

    You're fun. Are all your videos this whacky yet condensed education? Favorite part -- let me hook this to my sink and rub my socks on the ground.

  47. Farmer Dave
    Farmer Dave
    5 gün önce

    Now do the Uncle Fester light-bulb-in-the-mouth trick.

  48. Carter Bowe
    Carter Bowe
    5 gün önce

    I'm what you call a professional dumbass 😃😛

  49. Thomas PC
    Thomas PC
    6 gün önce

    So, that "very large register" will continually draw current? Making the bulb continuously using a tiny amount of electricity if when off? Or did I not understand that correctly?

  50. MajorEVEfan
    6 gün önce

    "I'm what you call, Professional Dumbass!" I feel your pain, brother!

  51. Correction Codes
    Correction Codes
    6 gün önce

    take a cheap razor... place between that fuking pair of catipillars you have for eyebrows and proceed to shave that unibrow.... the end...

  52. Spoutinwyze
    6 gün önce

    loved the video, hilarious and informative. funny thing, you google, "full bridge rectifier" and you're number one result. lol great stuff, subbed

  53. Blakkat Studio OonaVaKind
    Blakkat Studio OonaVaKind
    6 gün önce

    I'm what you call a professional dumbass ❤😄😂🤣

  54. Droid Account
    Droid Account
    6 gün önce

    awesome explanation, brings back my collage days

  55. Joao Rocha Braga Filho
    Joao Rocha Braga Filho
    7 gün önce

    Is there in Brilliant any course of Workplace Safety for you???

    7 gün önce

    Hello and Steve sent me! Love your videos man, I subscribed!

  57. CODfan Programmer Kid
    CODfan Programmer Kid
    7 gün önce

    There are 60 k steves in the world

  58. Mark Gleason
    Mark Gleason
    7 gün önce

    I was both educated and entertained! thank you! subbed and hit the bell notification. I hope your other videos are this good :)

  59. Mark Fergerson
    Mark Fergerson
    7 gün önce

    None of those making fun of you zapping yourself repeatedly are thinking about why the second half of your channel's name is BOOM. Seems self explanatory to me. (Oh, by the way- you're not the only one who uses their body as a capacitor. Or occasionally a resistor.)

  60. iCjay
    7 gün önce

    nothing better then unibrow science

  61. Melissa Dingle
    Melissa Dingle
    7 gün önce


  62. Rick Kardol
    Rick Kardol
    7 gün önce

    0:49 OMG haha! :)

  63. Paris Luh
    Paris Luh
    7 gün önce

    Excellent job! You are awesome! Please don't electrocute yourself to death. I mean, I love watching you electrocute yourself, just be sure not to die.

  64. 405line
    7 gün önce

    Is that free energy? I don't think you get charged for reactive power, place one of these in the passage/childs bedroom for a free night light.

  65. Green NoobYT
    Green NoobYT
    8 gün önce

    Professional D U M B A S S

  66. Mader Levap
    Mader Levap
    8 gün önce

    Around 3:29 subtitles break.

  67. Zhang clark
    Zhang clark
    8 gün önce

    Really handy

  68. Zhang clark
    Zhang clark
    8 gün önce

    Dude you need a drimell

  69. Lloyd McGriff
    Lloyd McGriff
    8 gün önce

    You Are The Best !!!! =) Thank You Sir !!! =D

  70. Blake Vaughn
    Blake Vaughn
    8 gün önce

    This guy is a legend...he shocks and hurts himself to teach other how not to get hurt with electricity.

  71. Bobcatjimmy 123
    Bobcatjimmy 123
    8 gün önce

    6:28 what my teacher must be thinking

  72. Bruce Reichert
    Bruce Reichert
    8 gün önce

    I would like the name of the light bulb. So I can do my own experiment.

  73. Miguel Rodriguez
    Miguel Rodriguez
    8 gün önce

    Hi! just wondering if you can make a video explaining negative voltages?

  74. Hackermann
    9 gün önce

    Mehdi: makes smooth transition to sponsors Linus: *My true successor*

  75. OkayDanegr Plays
    OkayDanegr Plays
    9 gün önce

    7:34 who else heard the voice crack?

  76. Anthony Cyrille
    Anthony Cyrille
    9 gün önce

    What is it, plastic ? ... What is it, titanium ?

  77. MisterBeebz
    9 gün önce

    So both bulbs use the same electricity when on and off but the cheap Chinese one makes use of it and still glows in the off position?

  78. Tex Red Tech
    Tex Red Tech
    9 gün önce

    I watched this right up to the point that he said " I am a professional dumbass "

  79. Burke Wills
    Burke Wills
    10 gün önce

    Your bud sent me. Liked and subscribed

  80. Stephen Le Page
    Stephen Le Page
    10 gün önce

    I'm already subscribed!