![]() ![]() During World War II, he supplied aircraft and submarines with lumed gauges and meters. ![]() ![]() Japan-based Kenzo Nemoto founded his luminous paint business back in 1941. “Lumibrite is a virtually permanent, non-radioactive, fluorescent coating that can light up the face of a watch, or just its hands and numbers, for up to five hours after two minutes exposure to sunlight.”Ībove: Seiko Golden Turtle Lumeshot Nemoto X Seiko Patent History Jiro Uchida, president of Seiko at the time Lumibrite was introduced summed it up in a single sentence: This excerpt is an official description of Lumibrite found in a Grand Seiko user manual here. The duration of the emitted light may also differ slightly depending on such factors as the brightness of the place where the watch is exposed to light and the distance from the light source to the watch. Please note, however, that, as Lumibrite emits the light it stores, the luminance level of the light decreases gradually over time. For example, if exposed to a light of more than 500 lux for approximately 10 minutes, Lumibrite can emit light for 3 to 5 hours. Lumibrite is a newly-developed luminous paint that absorbs the light energy of the sunlight and lighting apparatus in a short time and stores it to emit light in the dark. Lumibrite is a luminous paint that is completely harmless to human beings and natural environment, containing no noxious materials such as radioactive substance. In fact, many watch geeks believe every collection is deserving of an Orange Monster, partly because of the great lume they offer. LumiBrite (or Lumi Brite) is a very impressive type of luminescence found in Seiko divers ranging from a few hundred dollars to models reaching into the thousands. Heck, KeepTheTime even created an entire series called LUME WARS! But, aside from just looking at how brightly lume glows, it’s also neat to explore the technology and innovation behind each brand. Rolex Chromalight, etc, etc… there are lot’s of lume comparisons out there. ![]()
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