Reply to: LED lights

[Old Hack]

So let me get this straight... Since the fitment of these lights in your bathroom you now record the elapsed time from pressing the On switch to the actual illumination of the bulbs. And you have recorded a figure of exactly 1 ms.

I don't believe you.

I believe it takes the time of a blink, so I ensue I blink as I switch to see if they are illuminated. Yesterday, my blink slightly beat it to light up, so I have since called the sparky and asked him to remove the dis-functioning rubbish and to birch himself in penance.

[nomadd]

Normally a millisecond to light up..

So let me get this straight... Since the fitment of these lights in your bathroom you now record the elapsed time from pressing the On switch to the actual illumination of the bulbs. And you have recorded a figure of exactly 1 ms.

I don't believe you.

[Old Hack]

We've just had one of the Bathrooms converted to total LED and haven't seen this. Normally a millisecond to light up, and straight off.

[nomadd]

I had a fluorescent light in my bedroom as a teenager. That would glow after an evening's use if I touched it.

You sure you are talking about a "fluorescent light"?

[BlasterBates]

I doubt it´s technical

[suityou01]

or memristance

Thanks for sharing

[mudskipper]

It's art, innit.

Richard Box

[Platypus]

as a teenager it would glow after an evening's use if I touched it.

Typical for a teenager

[OwlHoot]

It can only be capacitance, or resistance or inductance ..

or memristance

[Sysman]

I bought an LED light bulb for our stairwell, and noticed that it was glowing even when the switch is off. Current leakage, I though (or badly wired socket). So I took the bulb out - and it still glows for a couple of hours.

I had a fluorescent light in my bedroom as a teenager. That would glow after an evening's use if I touched it.

[suityou01]

It can only be capacitance, or resistance or inductance - and it sure as tulip aint resistance. All you need to do is rule out which one of the other two it is.

HTH.

Discussed here

Probably for the same reason a neon lamp glows when it is connected to hot (and nothing else). LEDs respond to very low levels of current, the kind of current you might get when there is a slight capacitive coupling to earth (which is pretty much everywhere). Sometimes electronics isn't as straightforward as it seems.

It is responding to radiated energy, possibly 60Hz, possibly RF from a local radio station (I'm betting line frequency). A capacitor will divert the energy around the LED.

So this guy thinks it could be capacitance or inductance. I'd tip on inductance, and the possible RF could be anything, like your NAT router. Either way you are unlikely to figure out what it is, but strapping a 1mic cap across the beast in parallel will probly sort it out. Why not try it and write off to the vendor requesting a mod if it works

[suityou01]

Resistance is futile.

I can just see George Ohm strutting about in heaven with that on a T-Shirt.

[MarillionFan]

It can only be capacitance, or resistance or inductance - and it sure as tulip aint resistance. All you need to do is rule out which one of the other two it is.

HTH.

Resistance is futile.

[Diver]

It can only be capacitance, or resistance or inductance - and it sure as tulip aint resistance. All you need to do is rule out which one of the other two it is.

HTH.

what about God & Magic eh?

[suityou01]

I bought an LED light bulb for our stairwell, and noticed that it was glowing even when the switch is off. Current leakage, I though (or badly wired socket). So I took the bulb out - and it still glows for a couple of hours.

It can only be capacitance, or resistance or inductance - and it sure as tulip aint resistance. All you need to do is rule out which one of the other two it is.

HTH.