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2. The Bay Lights - Wikipedia

   en.wikipedia.org/wiki/The_Bay_Lights

   A test conducted on January 24, 2013 Opening on March 6, 2013 A time lapse image of Market Street, with The Bay Lights in the background. The Bay Lights was a site-specific monumental light sculpture and generative art installation on the western span of the San Francisco–Oakland Bay Bridge, designed to commemorate the 75th anniversary of its opening.

3. High-intensity discharge lamp - Wikipedia

   en.wikipedia.org/wiki/High-intensity_discharge_lamp

   Brand new high-intensity discharge lamps make more visible light per unit of electric power consumed than fluorescent and incandescent lamps, since a greater proportion of their radiation is visible light in contrast to infrared. However, the lumen output of HID lighting can deteriorate by up to 70% over 10,000 burning hours.

4. Metal-halide lamp - Wikipedia

   en.wikipedia.org/wiki/Metal-halide_lamp

   Like other gas-discharge lamps such as the very-similar mercury-vapor lamps, metal-halide lamps produce light by ionizing a mixture of gases in an electric arc.In a metal-halide lamp, the compact arc tube contains a mixture of argon or xenon, mercury, and a variety of metal halides, such as sodium iodide and scandium iodide. [7]

5. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   For each half-cycle, part of the LED emits light and part is dark, and this is reversed during the next half-cycle. The efficiency of this type of HP-LED is typically 40 lm/W. [54] A large number of LED elements in series may be able to operate directly from line voltage. In 2009, Seoul Semiconductor released a high DC voltage LED, named ...

6. Color temperature - Wikipedia

   en.wikipedia.org/wiki/Color_temperature

   Since fixtures using discharge type lamps produce a light of a considerably higher color temperature than do tungsten lamps, using the two in conjunction could potentially produce a stark contrast, so sometimes fixtures with HID lamps, commonly producing light of 6000–7000 K, are fitted with 3200 K filters to emulate tungsten light. Fixtures ...

7. High school valedictorian delivers poignant graduation speech ...

   www.aol.com/lifestyle/high-school-valedictorian...

   High school class valedictorian Alem Hadzic was unusually somber before delivering his commencement speech on May 16. “People were coming over to wish me luck and I was kind of blowing them off ...