yes
No. You need to rewire the circuit from the electric panel.
An adapter that has 220-volt input. The size (wattage) will depend upon what appliance you want to plug in.
Yes, this can be done. The adapter will handle at 120 volts x 15 amps = 1800 watts. The adapter is just a step up transformer. The maximum 220 volt device that can be connected can only have an amperage rating of 8 amps at 220 volts.
The bulb will be about half as bright.
If you buy the 220 Volt Adapter for the XL it will work fine. If you just plug it in the resistors and hardware within the charger will short out and be unuseable after that. I purchased the 220 Volt adapter for the DSI XL for less that $10.00 from Amazon and it worked fine.
My electrician says no, has to be some rewiring.
Mine was 220 and I suppose they all are.
That appliance might last longer if you use an eight volt adapter rather than a nine volt adapter.
the 220 volt bulp in 220 volt ac current
No
No. 220V adaptor can't control the output voltage, 110V appliance will be fry. Use instrument transformer or voltage regulator instead.