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2. Geochron - Wikipedia

   en.wikipedia.org/wiki/Geochron

   The Geochron was the first world clock to display day and night on a world map, showing the sinh "bell curve" of light and darkness. The Geochron employs an intricate analog clockwork mechanism for its display, that shows the month, date, day of the week, hours and minutes, the areas of the world currently experiencing day and night , and the ...

3. Nixie tube - Wikipedia

   en.wikipedia.org/wiki/Nixie_tube

   Glow-transfer counting tubes, similar in essential function to the trochotrons, had a glow discharge on one of a number of main cathodes, visible through the top of the glass envelope. Most used a neon-based gas mixture and counted in base-10, but faster types were based on argon, hydrogen, or other gases, and for timekeeping and similar ...

4. Lighting control system - Wikipedia

   en.wikipedia.org/wiki/Lighting_control_system

   The term lighting control system refers to an intelligent networked system of devices related to lighting control. These devices may include relays, occupancy sensors, photocells, light control switches or touchscreens, and signals from other building systems (such as fire alarm or HVAC). Adjustment of the system occurs both at device locations ...

5. Chemiluminescence - Wikipedia

   en.wikipedia.org/wiki/Chemiluminescence

   Lighting objects. Chemiluminescence kites, [17] emergency lighting, glow sticks [18] (party decorations). Combustion analysis: Certain free radical species (such as • CH and • OH) give off radiation at specific wavelengths. The heat release rate is calculated by measuring the amount of light radiated from a flame at those wavelengths. [19 ...

6. Philips Hue - Wikipedia

   en.wikipedia.org/wiki/Philips_Hue

   The Hue Bridge is the central controller of the lighting system which allows the bulbs to "communicate" with Apple HomeKit [5] and the app. In 2016, Philips released a new square shaped v2 bridge with increased memory and processor speed which replaced the round v1 bridge. The first-generation bridge received a final software update in April ...

7. Circadian clock - Wikipedia

   en.wikipedia.org/wiki/Circadian_clock

   In vertebrates, the master circadian clock is contained within the suprachiasmatic nucleus (SCN), a bilateral nerve cluster of about 20,000 neurons. [10] [11] The SCN itself is located in the hypothalamus, a small region of the brain situated directly above the optic chiasm, where it receives input from specialized photosensitive ganglion cells in the retina via the retinohypothalamic tract.