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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. Tritium radioluminescence - Wikipedia

   en.wikipedia.org/wiki/Tritium_radioluminescence

   As tritium illumination requires no electrical energy, it has found wide use in applications such as emergency exit signs, illumination of wristwatches, and portable yet very reliable sources of low intensity light which won't degrade human night vision. Gun sights for night use and small lights (which need to be more reliable than battery ...

5. 20 Products That Are Totally Dividing The Internet. Which ...

   www.aol.com/20-products-totally-dividing...

   #15 This Night Light And Alarm Clock Is Just What Your Room Needs For Some Toasty Vibes Review: "My 8 year old loves this alarm clock. My teenager even wants one now for her room.

6. Luminous paint - Wikipedia

   en.wikipedia.org/wiki/Luminous_paint

   Fluorescent body paint under a black light. Fluorescent paints 'glow' when exposed to short-wave ultraviolet (UV) radiation. These UV wavelengths are found in sunlight and many artificial lights, but the paint requires a special black light to view so these glowing-paint applications are called 'black-light effects'.

7. How a Quiet Flight to Iceland 'Became Something Magical' for ...

   www.aol.com/quiet-flight-iceland-became...

   The northern lights typically appear at altitudes of 70-200 miles above the ground, sometimes even higher. This means clouds can block them out. Be sure to check the weather and go to areas with ...