The cheap Chinese bulb that won't turn off


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Published: 3 months ago
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These LED bulbs will continue to draw power from the mains indefinitely even once they're switched off and the circuit is broken. But how?!

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Cool

6 hours ago

I don't like the capacitance theory for the answer. Col gave his answer below and his math is correct and his 636.6K ohms means nothing because when the switch is open there is infinite impedance. This capacitance effect IS there, at his measurement of 100pf/m, that is very small, to the point of negligible. What's happening is inductive pick up, the coil of wire or the house wiring is acting like a receiving antenna, producing a very small voltage, just enough to keep the LEDs on. My guess is if we did here in NA where our house voltage is 120V, this effect would go away.

6 hours ago

So it's not an induction loop?

8 hours ago

Humble Pi spotted over there on the ground!

19 hours ago

It's building a field-as in an inductor coil...not like a capacitor...

22 hours ago

Nothing to do with capacitance, not storing nothing. Its the absolutely small voltage it is requiring to light it being produced by improper wiring, I have bought 4ft LED lights that stay slightly lit because as with most chineseum trash its done improperly if not dangerously and was not grounded properly and is not bleeding off the slight induction / current into the ground but into the light causing the slight glow....

22 hours ago

i put an LED bulb in my cars dome light and it does the same thing. it has a very light glow that really isn't noticeable but i always found that to be strange.

23 hours ago

Pleb Failsworth The residual glow may happen (others have reported it, too), but it categorically cannot be caused by the effect in this video, since capacitive coupling only works with AC power, but a car is DC.

23 hours ago

In my opinion, all the extra wire is acting like a transformer, not a capacitor.

23 hours ago

sorry buth you are wrong it could happen in dc system also

i have at my home only sun power that charge battery's 12v dc system and the lights are al led lights when i turn off the light switch the led keep on burnning noth so bright buth they still a litle even when disconnect one wire from from the bulb they still keep on a little they are12v dc led becourse hole the ligthing system is 12 v dc

2 days ago

The reason why the light bulb won't turn off is because it's still getting a certain amount of ground which then passes through like another positive extend doesn't turn off but if you had direct current it would turn off and on

2 days ago

A coil is not a capacitor sorry, that lamp is just too sensitive and the wires that are too close to one another are causing induction that is just enough to power that lamp. It's the same as gas neon lamps that can glow whilst being connected to live wire only without the neutral connection.

3 days ago

@Antonio Tejada I did not say additional capacitor please re-read my previous reply, i said that the only capacitor would store sufficient charge to power this led lamp would be the electrolytic capacitor as even tho this is a low consumption led lamp it would still bleed it out rather quickly. As these wires do not contain electrolyte than these wires can only imitate either film caps, ceramic caps or tantalum caps. Which neither can store anywhere near enough charge to keep a led alive for such a long time. What happened here is a load of wires imitate a coil and once the switch have been activated it generated a pulse/loop however the coil needs to be juiced at all time to have these loops running and powering the led. Thats where the other live wire comes in that goes before the witch and is constantly connected to to the mains. That live wire works as a aerial and generates inductance to the other wires causing non stop charge loops to the coil effect and thus makes a led glow non stop where as a capacitor would need to have the amount of (MF) that is impossible to create from few meters of wires.

3 hours ago

@Andy What are you talking about? Nobody is talking about an additional capacitor. The capacitor that's doing the coupling is the cable itself. You do know that a capacitor (regardless of type) is made of two plates and an insulator, right? In this case, the cable's insulation is the insulator, and the copper wires inside are the plates.

Look up a capacitive dropper LED driver circuit. Then realize that the effect shown in the video is, in fact, an accidental capacitive dropper circuit.

9 hours ago

I spent three years in college and two years in uni in regards to micro electronics and technology in Birmingham so please stop. Only the electrolytic capacitor would survive being charged whilst constnly connected to neutral wire as only the live wire gets broken whilst neutral would bleed this type of capacitor very quickly in this case the closest relative would be film capacitor which is the only one that can hold charge to power this lamp and imitate the effect of these wires. However electrostatic capacitors bleed out near instant if they are still attached to neutral wire which caused aes discharge. Whilst imitating the coil effect with these wires would be more accurate as the coil can cycle itself for a prolonged time.

12 hours ago

Andy No. The neon lights for the same reason as this video (correctly) describes: capacitive coupling.

23 hours ago

Actually, George Westinghouse won. Tesla provided the theory, but Westinghouse owned the utility.

3 days ago

Dry Roasted I came to say the same thing!! :)

23 hours ago

If it really works electric companies would have been broke by now since everyone will be doing it for free energy!

4 days ago

Show this to an American politician and that person will run with their interpretation of free energy from this information into a flawed concept of the "New Green Deal" that will save the world.

5 days ago

E Boom a? 😗 Thank for posting. Later Steve

5 days ago

Illuminating....

5 days ago

This guy is on another level, live words, waving hands around, hiding water above a live socket and spraying drops around, and most of all, forgetting about how electric induction works but jumping into conclusion of capacitance.

6 days ago

how do i fix my led lamps that are in series but the last one doesnt pass the wire to somewhere

1 week ago

it's not costing you any money beyond what having other types of bulbs in there, which would shunt the current and not light up. in fact it likely costs less, being such a high impedance device!
think about it, the electricity is still leaking and flowing regardless of any bulb/motor/device/load being on the end, the closer to open circuit the whole wire is, equals less total energy loss.
induction out on the poles at very high voltages is huge and can electrocute transmission line workers on "dead" lines, which is why they always bond them together and to ground/earth.

1 week ago

I bought led edison bulb and it won't turn off. Unsolvable for bedroom to have all time lights on, even in small dosage. What to do?

1 week ago

Your explanation and theory is all wrong

1 week ago

Is it inductance? That's cool.. I kind of want some of these.

1 week ago

The same thing happens when you put the switch on the negative wire and the live wire is always connected to the bulb. It only happens on an LED bulb but not on incandescent bulb. The proper way to connect a switch is on the live connection between the source and the bulb. But that is a different story when you have a coil of wires.

1 week ago

At 6:43 he states that Edison did not win Tesla won, that is the exact opposite of the truth (and I'm sure only a "dyslexic" mistake), Tesla unfortunately lost because of Edison's dirty tactics and manipulations. At 7 minutes into this video, he states that England uses 60 cycles per second or hertz and the US uses 50 cycles per second. Obviously his "verbal dyslexia" is setting in again, because once again the exact opposite is true, the US uses 60 cycles per second or 60 hertz, and I presume that England uses 50 cycles per second or 50 hertz. I don't know if anybody else caught that or not, I did not scroll through the other 2,500 comments on this video.

1 week ago

Great. Tesla costs us the electricity because of inductance created by AC.
I too wondered why the bulb glows so long even if weakly. Now knowing that electricity is spent... at least it is very, very small amount.

1 week ago

how about using multimeter mate, to see what is the residual voltage this "capacitor" gave out. You can even measure the farads (capacity) of the cable coil ("capacitor")

1 week ago

Well I’m disappointed , I was looking for Free Energy to have my bulb light up without one end of the wire connected to the circuit.

1 week ago

I was thinking it works like a garbage transformer

1 week ago

Capacitor lets ac pass

2 weeks ago

It's called "perpetual energy"

2 weeks ago