Hi! One of my friends Steve Mould
Which is also a great Science Youtuber told me about an issue with LED lights
Most my friends are called Steve. Helps me remember their name.
Like and subscribe if you are also a Steve!
Basically Steve describes in his video, which is a companion to my video
that when you turn off the light switch, some of the LED lights never quite turn off.
[Switch noise]
Steve: And it stays on. Can you see it still glowing?
I have heard of this problem in different forms, like some people said
when they touch the body of their desklamp
the LED lights starts glowing. But the problem is
that i have the LED lights all over the place at home
and i've never seen this problem.
So i had to go buy these lightbulbs, that have such problem. Let's get them to glow.
These lights won't fit my light socket, so i'll connect them
using my alligator clip.
[Pop] F***!
You shouldn't forget to turn the light off, or open the breaker before working on your electricity.
Okay, so i can turn it on, but when i turn it off..
Doesn't glow at all.
[Flicks the switch again]
Ah.. what am i.. it's not made for my socket anyway.
Oh! Hehey! Look at this!
S***!
[Flicks the switch]
[Flicks the switch again]
Okay.. apparently that's connected to the live wire
but i'm not connected anywhere and
probably that's why it didn't shock me.
Yep! No! Wha.. Look at this!
it's glowing!
Hahahahaha
I love discovering by accident!
See I'm isolated from the ground, but there is a super small capacitance
between my body surface to Earth that when i touch the
other terminal of the LED a *super* small current runs through
my body and makes the LED glow.
So in those cases where the LED still glows there must be some capacitance
in the house wiring, and Steve helps me uncover
that mistery in his video which you should watch
following the card here, or link in the description.
After I'm done here!
And you should definitely subscribe to him.
His science voice is so soothing I watch him for Therapeutic purposes.
Steve: If you like him.. think about subscribing.
Do You know what? Just subscribe. It's a good channel-
Okay, okay. But now we know these lamps are super sensitive and are different from the other type
These lights are so sensitive, that if i connect one terminal to ground
through my faucet and hold the other terminal
and rub my foot on the carpet..
it glows from the static i'm creating.
Let's measure the current. You never touch the live wires
I'm what you call.. a professional dumbass.
Now here the LED light is only connected to the live wire
and the other terminal goes through the Amp meter where i touch.
And my feet are off the ground, and if i touch it..
You see a tad bit of glow there
and the current is around 2 Microamps.
Now if i put my feet on the tile ground you see it goes much brighter.
I still don't feel anything.
The ground provides a much higher capacitance but it is still not conductive
and the current is around 40 Microamps
Now what if i touch the ground wire with my pinky and close the circuit.
This might give me a shock.. Oh, oh, okay
Okay, It's not shocking me.
And the current is around.. 130 - 140 microamps.
Very small.
Now let's measure the voltage across the lamp in these different modes.
Right now my foot is off the ground and the voltage is around 60 volts.
And with my feet on the ground..
it is around 70 volts, and through my finger..
Is like.. 73 - 74 volts.