Step inside or look toward the top, and you are contemplating a true technical marvel. The lighthouse houses a first-order Fresnel lens, a sophisticated array of 16 panels of ground glass that focus light into a powerful, concentrated beam. Today, this lens apparatus is estimated to be worth 5 million euros. It is a testament to nineteenth-century engineering that the original lens remained so reliable it only required its first major maintenance in 1993, after more than 100 years of continuous service. While the light originally burned with an oil lamp, it was electrified in 1936 and automated in 1984. Currently, a 230 volt halogen metal vapor lamp sits at the center, projecting a white flash every 7.5 seconds. This light reaches an incredible range of 23.3 nautical miles, or about 43 kilometers, out into the sea, ensuring safety for modern shipping traffic just as it did for sailing vessels over a century ago.