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2. Sodium-vapor lamp - Wikipedia

   en.wikipedia.org/wiki/Sodium-vapor_lamp

   A high-pressure sodium street light in Toronto A high-pressure sodium-vapor lamp An HPS lamp that isn't entirely off. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Two varieties of such lamps exist: low pressure and high pressure.

3. Havells Sylvania - Wikipedia

   en.wikipedia.org/wiki/Havells_Sylvania

   Following Sylvania's invention of the red-emitting phosphor for colour television screens, a spinoff application created the modern deluxe colour mercury lamp. [7] 1966 — MetalArc; Invention of the sodium-scandium lamp chemistry which continues to set the standard for metal halide lighting all over the world. [8] 1968 — The Flashcube

4. Gas-discharge lamp - Wikipedia

   en.wikipedia.org/wiki/Gas-discharge_lamp

   High-pressure lamps have a discharge that takes place in gas under slightly less to greater than atmospheric pressure. For example, a high pressure sodium lamp has an arc tube under 100 to 200 torr pressure, about 14% to 28% of atmospheric pressure; some automotive HID headlamps have up to 50 bar or fifty times atmospheric pressure.

5. High-intensity discharge lamp - Wikipedia

   en.wikipedia.org/wiki/High-intensity_discharge_lamp

   Diagram of a high-pressure sodium lamp A high-pressure sodium lamp, Philips Master SDW-T 100W. Various types of chemistry are used in the arc tubes of HID lamps, depending on the desired characteristics of light intensity, correlated color temperature, color rendering index (CRI), energy efficiency, and lifespan. Varieties of HID lamp include:

6. High pressure sodium lamp - Wikipedia

   en.wikipedia.org/?title=High_pressure_sodium...

   Sodium-vapor lamp#High-pressure sodium; This page is a redirect. The following categories are used to track and monitor this redirect: To a section: ...

7. Telltale Signs You Need to See a Doctor for Your Cough - AOL

   www.aol.com/telltale-signs-see-doctor-cough...

   The odds are high you’ve had a cough before in your life, but each time can throw you for a loop. Even though you’ve been through this, it can be hard to know when to see a doctor for a cough ...