One of the explanations offered as a cause of the HSL, is of course headlights. I have included these photographs as an example of how the camera captures the headlights from Hwy66 as well as from the town of Quapaw, Ok. The following collection of photographs were shot with two different systems which will be identified below.... I have recently had the camera repaired that I used to shoot the HSL photographs, in 1980. During my next trip to the HSL, I will duplicate the exact conditions and equipment. I will photograph the headlight phenomena again, so as to have an apples to apples comparison... Until then enjoy...