OK. I'll have to do some testing with my multimeter to see what the actual output voltage is. And I have seen that some cars that have outlets on the say they are 110v or 115v instead of 120v. So maybe it is just the company of the inverter referring to 240v as 220v or 230v.

If the ballast is a simple reactor ballast or leak transformer ballast, the lamp would probably be marginally underdriven, but within tolerable levels. In North America, some people often refer to 240V as “220V” and some people refer to 120V as “110V” as well.

I have one last question. There are some ballasts that only run on 240v, but most European inverters convert 12v DC to 220v/230v 50hz but not 240v. Would this effect the ballast in any significant way?

Thanks for the info. I guess with enough trial and error you can easily make a electronic fluorescent ballast.

This was called Gallopin' Gertie, which occurred near me. The bridge was constructed in a way so that the wind would cause it to flex. The bridge was only four months old when it collapsed. A dog was the only being that died. The lights are Westinghouse AD-10s.

What power level you are looking for? Even with rather moderate 150VA rating of the inverter you can easily run into quite extreme currents, like 15+ amps. BTW, PC power supply is not the best way to get high power at 12V, typically start to behave funky on unbalanced load when heavily loaded at 12V channel and zero current on others. There is a myriad of proper modular 12V bricks of necessary power out there for cheap. Go 24V way, though if you can get 24V inverter, this means easier life with half the current.

I was looking on ebay for them, probably wasn't the best choice as the cheapest one was for $240. But looking at Facebook Marketplace brought up some good options. But honestly I'd rather have a continuous source of power from the wall, so 120v 60hz and getting 12v DC using a PC power supply and then a European inverter to get 240v (or similar voltage) 50hz.

Here is a video of a new Leda lantern which was also compared to the 2nd gen. of the Leda.

https://youtu.be/3RZHQB1839M?si=Q1bfu9IfWAnLLmW5

Certainly, the reflectors on the 3rd one don't look very well but gives a good width of light than the 2nd one which has better looking reflectors (in my opinion). Enjoy the video 

Pretty much. The cables and pylons were reused for the new bridge, which still stands today. I believe the bridge was very new when it collapsed.

So this is a poor built hanging bridge. Hanging bridge is the most unsafe design of bridge.