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2. Full-spectrum light - Wikipedia

   en.wikipedia.org/wiki/Full-spectrum_light

   Full-spectrum light is light that covers the electromagnetic spectrum from infrared to near-ultraviolet, or all wavelengths that are useful to plant or animal life; in particular, sunlight is considered full spectrum, even though the solar spectral distribution reaching Earth changes with time of day, latitude, and atmospheric conditions.

3. Artificial sunlight - Wikipedia

   en.wikipedia.org/wiki/Artificial_sunlight

   Artificial sunlight is useful in treating and preventing seasonal affective disorder (also known as winter depression, which causes depression symptoms specifically in winter), [3] and delayed sleep phase syndrome, in which the circadian rhythm (the rhythmic alternation between daylight and nighttime behavior and bodily states) is disturbed and the person falls asleep much later than he or she ...

4. Sunlight - Wikipedia

   en.wikipedia.org/wiki/Sunlight

   Visible range or light spans 380 to 700 nm. [24] As the name suggests, this range is visible to the naked eye. It is also the strongest output range of the Sun's total irradiance spectrum. Infrared range that spans 700 nm to 1,000,000 nm (1 mm). It comprises an important part of the electromagnetic radiation that reaches Earth.

5. Mercury-vapor lamp - Wikipedia

   en.wikipedia.org/wiki/Mercury-vapor_lamp

   A 175-watt mercury-vapor light approximately 15 seconds after starting. A closeup of a 175-W mercury-vapor lamp. The small diagonal cylinder at the bottom of the arc tube is a resistor which supplies current to the starter electrode. A mercury-vapor lamp is a gas-discharge lamp that uses an electric arc through vaporized mercury to produce ...

6. Solar simulator - Wikipedia

   en.wikipedia.org/wiki/Solar_simulator

   Carbon arc lamps benefit from higher-intensity UV emission. However, they have the disadvantage of being generally weaker in intensity than similar xenon arc lamps. [1] In addition, they have a short lifetime, are unstable during operation and emit high-intensity blue light mismatched to the solar spectrum. [1]

7. When and where to see the northern lights after the latest ...

   www.aol.com/where-see-northern-lights-latest...

   The interaction causes the atoms in Earth's atmosphere to glow, creating a spectrum of color in the night sky. PHOTO: A view of the Northern Lights by the Eklutna Lake in Alaska, December 31, 2024 ...