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2. Grow light - Wikipedia

   en.wikipedia.org/wiki/Grow_light

   A grower can run an HPS conversion bulb on a MH ballast, or a MH conversion bulb on a HPS ballast. The difference between the ballasts is an HPS ballast has an igniter which ignites the sodium in an HPS bulb, while a MH ballast does not. Because of this, all electrical ballasts can fire MH bulbs, but only a Switchable or HPS ballast can fire an ...

3. Electrical ballast - Wikipedia

   en.wikipedia.org/wiki/Electrical_ballast

   [9] [10] The ballast factor of practical ballasts must be considered in lighting design; a low ballast factor may save energy, but will produce less light and short the lamp life. With fluorescent lamps, ballast factor can vary from the reference value of 1.0.

4. 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.

5. V.J. Edgecombe scores 19 points as No. 25 Baylor opens ... - AOL

   www.aol.com/v-j-edgecombe-scores-19-213236635.html

   V.J. Edgecombe scored 19 points, three other Baylor players had 15 and the 25th-ranked Bears led throughout in an 81-56 win over Utah on Tuesday in the Big 12 opener for both teams. Baylor (9-3 ...

6. Trump warns BRICS nations against replacing US dollar

   www.aol.com/news/trump-warns-brics-nations...

   U.S. President-elect Donald Trump on Saturday demanded that BRICS member countries commit to not creating a new currency or supporting another currency that would replace the United States dollar ...

7. High-intensity discharge lamp - Wikipedia

   en.wikipedia.org/wiki/High-intensity_discharge_lamp

   Ballasts for discharge lamps. Like fluorescent lamps, HID lamps require a ballast to start and maintain their arcs. The method used to initially strike the arc varies: mercury-vapor lamps and some metal-halide lamps are usually started using a third electrode near one of the main electrodes, while other lamp styles are usually started using ...