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2. Radium dial - Wikipedia

   en.wikipedia.org/wiki/Radium_dial

   November 1917 ad for an Ingersoll "Radiolite" watch, one of the first watches mass marketed in the USA featuring a radium-illuminated dial. Radium was discovered by Marie and Pierre Curie in 1898 [1] and was soon combined with paint to make luminescent paint, which was applied to clocks, airplane instruments, and the like, to be able to read them in the dark.

3. Radioluminescence - Wikipedia

   en.wikipedia.org/wiki/Radioluminescence

   Radioluminescence is the phenomenon by which light is produced in a material by bombardment with ionizing radiation such as alpha particles, beta particles, or gamma rays. Radioluminescence is used as a low level light source for night illumination of instruments or signage.

4. Luminous paint - Wikipedia

   en.wikipedia.org/wiki/Luminous_paint

   Radioluminescent paints will glow without exposure to light until the radioactive isotope has decayed (or the phosphor degrades), which may be many years. Because of safety concerns and tighter regulation, consumer products such as clocks and watches now increasingly use phosphorescent rather than radioluminescent substances.

5. The 12 best gifts for your son’s girlfriend: From birthdays ...

   www.aol.com/lifestyle/best-gifts-for-sons...

   The Hatch Restore 2 also comes with a dimmable alarm clock light, a nature-inspired sound machine, and can coach you through meditation and mindfulness exercises. $200 at Nordstrom Related Articles

6. Super-LumiNova - Wikipedia

   en.wikipedia.org/wiki/Super-LumiNova

   Nemoto & Co., Ltd. – a global manufacturer of phosphorescent pigments and other specialized phosphors – was founded by Kenzo Nemoto in December 1941 as a luminous paint processing company and has supplied and developed luminous paint to the watch and clock and aviation instruments industry since.

7. Dawn simulation - Wikipedia

   en.wikipedia.org/wiki/Dawn_simulation

   Dawn simulation generally uses light sources that range in illuminance from 100 to 300 lux, while bright light boxes are usually in the 10,000-lux range. Approximately 19% [4] of patients discontinue post-awakening bright light therapy due to inconvenience. Because the entire treatment is complete before awakening, dawn simulation may be a more ...