Luminox Watch Sea Leatherback Sea Turtle Giant 0320 Series Black XS.0321.ECO. All Luminox watches are Swiss Made and feature our unique and energy independent LLT illumination system. They shine continuously, without the need to press a button, for up to 25 years. The name says it all, combining the Latin words lumen, or light, and nox, meaning night. These are just some of the reasons why Bear Grylls, adventurers and outdoor instructors, the Icelandic Association for Search and Rescue (ICE-SAR), the U.S. Navy SEALs, and many other professionals all over the world rely on us.