This is a quick two stage puzzle, but I use the word "quick" loosely due to the time spent is completely up to the cacher.
Upon finding the tubberwear container at the posted coordinates, you will notice a few items in the cache.
-A 9Volt Battery
-A wired adapter with Gator Clips at one end
-Two "Teset Bulbs" to ensure the connections are proper in the wired adapter (Red tip will not blow)
-A wooden Prism with screws engraved within the object
Simply put, use the battery with the adapter and light that bulb in the prism by completing the circuit. Use one screw on the left side and one screw on the right side, and when you find the right combination, record the numbers corresponding to that screw. The numbers are both engraved to the side of the Prism, AND on the side of the screw, both numbers are the same, but it's a good way to double check yourself.
The final will be at N39 22.??? (Left screw) and W084 50.??? (Right Screw). It's a quick ride to the final, but I WILL tell you it is on SPARKS Road. Appropriate Road name, eh?
IMPORTANT: The Final will be within six feet of a public road. No need to enter any fields or go through any thicket to get to the projected GZ.