SYLVANIA Automotive used New Hampshire Motor Speedway as the testing site for two headlight experiments.  In two episodes of "Truth Sleuths," Greg and Joe from SYLVANIA Automotive discuss two theories about headlights.

In the first episode, the Sleuths test the effect of age on the headlights.  They compare brand new and aged headlights for differences in visibility.  In the second episode, they test the effect of hazed over headlights in comparison to new, non-hazy headlights.