The flow of electricity is based on voltage, which is measured in volts, and current, which is measured in amperes. Practically the entire American continent uses a power of 110v to 120v. As far as safety is concerned, this power is relatively safe when installing or handling it.
On the other hand, Africa, Asia, Oceania and much of Europe, use a range of 220v to 240v. The 220v wiring is much easier to install. In addition, it is cheaper and easier to handle. In appliances and other high-power electrical appliances, they give better performance, since they consume less amps.
So in a country with 110 voltage, a 60 watt light bulb will require about 0.54 amps of current. On the other hand, in a country with 220 voltage, the same light bulb will require 0.27 amps of current.
Consult your experts at Oscar Electric Atlanta for the correct installation for the voltage in your project.