The big diffrence is that in the USA most airfields are owned and run as an essential public service by the local municipality. No landing fees, everything is paid for out of local taxes.
Contrast that with the UK where airfields are run on a shoestring by clubs and individuals. A lighting system is an expensive investment which needs to be justified by increased income from landing fees etc. In most cases it would take decades or even centuries to recover the cost.
Expect to see maybe one or two places where a wealthy owner wants a lighting system for his own convenienc regardless of cost, these will be rare.