[Operator]

I cannot completely decipher your abbreviations ... sorry

In order to light neon tubes you need a higher voltage 70 .. 80 Volts minimum.
So, since you have to raise the voltage anyway just look for a normal inverter producing 110 Volts AC.
I guess that's the most simple thing to do ... and because it's regular stuff it will not be too expensive.

I have 2x 1500 Watt inverters .... I used 1 two days ago when there was a short blackout in the evening.

I don't know if it applies for you but I made 2 extra male-to-male power cables. When the power is down I flip the main power switch
to assure being disconnected and plug the inverter's output into an ac outlet to power that whole group.
You would need at least one cable per group ....

I know there are also neon lamps for sale with a built-in inverter. But a separate one will be more versatile.

And another alternative is using halogen lamps. They are 12 volt applicable already and are also easy to get.

Cheers