Florida's Ghost Lights

I have heard of the Marfa Lights seen near Marfa, Texas, as they are not an infrequent subject of television programs on UFOs and other strange phenomena. But this is the first I've heard of the Oviedo Lights, an apparently similar phenomena on Snow Hill Road between Chuluota, Fla. to Geneva, Fla. According to the New York Post article at the link, reports of the lights go back to 1960s. Per the article:

The blue lights appear primarily in the winter, most often around midnight, and always approaching from the south on a bridge over the Econlockhatchee River. The lights make it appear as if there is an oncoming car, except with the brightness of a train headlight, according to a blog post written by the historian [Jason Byrne].

Apparently the lights are generally ascribed to ghosts due to several tragedies in the area. 

    The tragedies in the rumors, while specific in some cases, are unconfirmed. Byrnes told News 6 that of all the tall tales told about the lights, only one has ever been verified.

    In 1963, 17-year-old Norbert Hyman drove across the bridge with three of his friends to set off some fireworks. When they’d finished, one of the friends returned to the car, while the other three walked back to the main road.

    The friend who went to get the car didn’t turn the headlights on and drove down the main road towards the others. Two of the teens managed to dive out of the way, but Hyman was fatally struck and died on the way to the hospital.

    “Whether you believe it’s the root of the actual ghost story — and this kid is ‘haunting,’ if that’s your way of believing — or whether you just think that it’s the root ghost story that kicked off all these other stories, that’s, I guess, up to the reader,” he said.

The article has a photograph of the light taken on October 6, 1969, but no scientific explanation has been offered other than it might be a will-o-wisp--i.e., ignited swamp gas.