what like this?
**broken link removed**
I can see one MAJOR benefit from doing this...
As the length of the run way can be very long, runing lights that draw a lot of current, the cables would have to be quite big. $$$$$ding ding ding. money for copper.
Plus when excess current is drawn you get voltage drop,
So by running transformers in series, they run HV (well maybe not HV, but a higher voltage)
When a globe pops though, not all pop.
By doing this you can Up the Voltage, therefore lower current, therefore MUCH smaller cables. Less costly, and little voltage drop problems (because of low current)
And the transformers ratio then converts the higher voltage down, therefore more current to the light.
I am only guessing here.....
But it sort of makes sense.