The scientists actually doing field research have a great approach, however the nay-sayers are debunking this without even going there to take a look.
Plasma-orbs have been the most bold explanation from those parts, but it doesn't account for the seemingly intelligent and/or controlled movement of the lights.
Highly interesting, just too bad it's a long drive from here to actually visit the place myself. Maybe some time I got left over time and resources to make the trip.