💡The original First Order Fresnel lens that was installed in the St. Augustine Lighthouse in 1874 is still reflecting light from its 370 prisms! The light comes on every evening from a sensor. Get a peek of the lens when you climb the tower during the day during regular hours or at night on a Dark of the Moon tour. Details at staugustinelighthouse.org #staugustinelighthouse #lens #light #fresnellens #prism #reflection #lighthouse #staugustine #lovefl #floridahistory #saintaugustine #museum #non