Orb or Ghost Light?

The book Beyond the Impossible is a fascinating read about mysteries of the unknown, told in chronological order. On one page we read this:

"Glowing spheres have startled many travellers along the lonely stretches of road that criss-cross the vast expanse of Alexandria Station....Mysteriologists have uncovered several locations around the world where balls of light variously labelled will-o-the-wisps, ghost lights or spook lights, are regularly seen....The most famous examples are probably the American varieties, the Saratoga and Marfa lights of Texas, the Brown Mountain lights and Maco lights of North Carolina, and the Hornet spook lights of Missouri." 

On the page here we read that some of these "ghost lights" are associated with reports of ghost sightings.   I was surprised to read of a "Spook Light Road" near Neosho, Missouri, where my grandmother lived most of her life. On the page here we read this account:

"In November 1977, a married couple climbing Mount Snezka...lost their way and found themselves in serious difficulties when it began to snow heavily. Realising their position was becoming serious the two climbers were suddenly confronted by a large blue globe which floated several feet off the ground, shining with a clear, warm light."

We are told the strange globe guided the two to safety.  At the page here we read this:

"Bobbing and bouncing along a dirt road in northeast Oklahoma is the Hornet Spook Light, a paranormal enigma for more than a century. Described most often as an orange ball of light, the orb travels from east to west along a four-mile gravel road."