You don't, at least, not legally.
220 volt will use less energy.
No, a 120V light bulb should not be used in a 250V socket. The bulb is designed to operate at a lower voltage, and connecting it to a higher voltage source can lead to overheating, damage, and potentially cause the bulb to burn out or even create a fire hazard. Always use bulbs that match the voltage rating of the socket to ensure safety and proper functioning.
Amp draw is always combined. 220V is uncertain if it is three phase or not, because there are both one phase and three phase applications of the 220V motor. In any case, the answer is always "combined".
No it is not
no 208v is bigger
UK is 220v
To rewire a 220V lamp for 120V, you will need to replace the existing 220V bulb with a 120V bulb that is compatible with the lamp's socket. Next, you will need to install a 120V compatible power cord that matches the voltage requirements of the lamp. It's important to refer to the lamp's manual or consult with a professional electrician to ensure the rewiring is done correctly and safely.
120V appliance will not work on 220V. Use an instrument transformer or voltage regulator to adjust the high voltage to the desired level.
Brazil has a nominal voltage of 220/380V.
No, 120 v is not enough.
No, connecting a 120V device directly to a 220V power source is not safe and can cause damage to the device, create a fire hazard, or result in electrical shock. Devices are designed to operate at specific voltage levels, and exceeding that can lead to catastrophic failures. If you need to use a 120V device in a 220V environment, consider using a step-down transformer to safely convert the voltage.
2 gang
No
No.
This type of a transformer is known as a step up transformer.
220 volt will use less energy.
If all the components are rated to 220V, yes. Keep in mind that if the appliance was designed for 110V it may arc if 220 is run through it. If you don't know the device can handle 220V, don't run it at 220V. Chances are it was manufactured cleaply and cannot handle the extra voltage.