Yes, they are No, 110 to 120 volts are a nominal figure in the same voltage range. It is brought about by the power company, as they have a responsibility to keep voltages within a certain 10% range. The load will only notice a difference of 1% on the load current.
You are charged by the wattage that is used and not by the volt.
Theres a nice formula for this: Wattage / Voltage = Amperage. The voltage and amperage can change, the wattage always stays the same. Note that a 1000 watt sodium ballast draws 1100 watts.
To run them on 110 volts would be very large. Determine the maximum amperage it will handle before it melts! The load is split between two 110 volt wires.
This allows you to run smaller wire. This brings us to the "probably" part of the answer. The voltage drop or the voltage lost when the power travels down the wire.
The resistance on the wire, the less the voltage drop. Grow room for 220 volts. A grow light.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.