Is the a LIGHT SOCKET to 120v Converter?

Just about any hardware store should carry them.

What's it called... I couldn't even find one on Ebay....

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screw-in outlet.
http://www.lightingco.com/catalog/Plug-Screw-in-Outlet-p-17147.html

Any hardware store will have it.

See the other threads for answer.

Most computers have a 3-prong plug however so you will also need a non-grounding plug adapter as well to piggyback onto it.

However without the earth ground you make touching the computer and other nearby appliances or pipes a danger for electrical shock.

Also with respect to "Some places in the world...", USA and Canada operate on 110-120 VAC 60 HZ as the electrical standard.

When in Europe most places are 220 VAC 50 HZ. As such the adapter is a whole other animal.

Check your local hardware/homecenter store. people use these things all of the time, eg: outdoor christmas lights.
Note! these do NOT have an earth pin (ground) thefore if you need to plug a 3pin plug into one of those... you will need an adaptor.
Now some countries use a different style socket than the standard medium base screw socket. those adaptors to medium base screw sockets may be found on the internet.

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Previously, D. Kirkpatrick wrote:

[question and good info snipped]

Also with respect to "Some places in the world...", USA and Canada operate on 110-120 VAC 60 HZ as the electrical standard.

When in Europe most places are 220 VAC 50 HZ. As such the adapter is a whole other animal.

All recent macs have auto-switching power supplies rated for 50-60Hz, 120-220V. The supply for my Aluminum PB, for example claims 100-240V, 50-60Hz.

Previously, John Johnson wrote:

All recent macs have auto-switching power supplies rated for 50-60Hz, 120-220V. The supply for my Aluminum PB, for example claims 100-240V, 50-60Hz.

Any rear panel switches?

Even so, the plug style is quite different.

No, it's a power-brick for my PowerBook. I don't think that Apple's provided a manually-switched power supply for 10 years (I do recall that they used to provide manually-switched power supplies in their desktops, but I think that they went to auto-switching in the early '90s).

Even so, the plug style is quite different.

Quite correct. However, the OP is planning (if I understand the situation correctly) on purchasing an adapter that screws into a light socket. Provided they purchase the correct adapter (i.e. purchase it in the country where their computer was sold), and provided that the light sockets where they go to are the same, then it will connect. That's not the limit of potential problems (exceeding maximum current load on the circuit is an obvious possibility), but it's about the limit of the ones that we can do anything about from the far side of the internet.

Like prisons.

You can buy them at the hardware store, but they're not going to allow you to take either them or the powerbook into the cell.

No. The power supplies are auto-switching.

Even so, the plug style is quite different.

You have to replace the cord. The end of the cord that plugs into the "mains" is different.

YEP, IN YOU LOCAK HARDWARE STORE. I USE THEM ALLL THE TIME. It is a screw type base to 110 plug about 99 cents

John

No Problem,in Thirth World Countries You see them a lot. BUT,don't you worry about the voltage for Your laptop,it'll take any juice from 100 to 240 volts-50-60 Hz.
It's an switched Powersupply and those have a wide input range of Voltage!!! Cheers