Sorry to mention the 'W' word so early, but I've been thinking that this year I would ideally like a large free-standing light at my field gate which I can power off a car battery. Can anyone recommend one?
I use one of these http://m.screwfix.com/details.htm?id=37593 run off a generator as I have no electric. I'm sure you could run one off a car battery with a convertor on it. It lights up a good size to school on. It does cast shadows (our pony is used to it ) but you could use more than one. They are cheap too! xx