Limbsaver Prism Elite Sight System. The Limbsaver Prism Site series is the clearest and brightest site available today. SVL engineers have developed a light collection system that loads ambient light directly into the end of the fiber optic material. End Loading fiber is by far the most efficient way to transfer the light source to the end of a fiber optic pin. In addition to this, the collection lens system is the only technology available that will take natural ambient light from anywhere above the horizon and not only direct it to the fiber end, but intensify the natural light in the process.