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Metal halide lamp - Metal halide lamps are similar to mercury vapor lamps, but instead of just mercury, they also contain sodium/scandium iodide and sometimes metals in the rare earth period combined with halogens in the halogen group of the periodic table. They are preferred over mercury vapor in areas where color rendition is important as they give a purer white light than mercury vapor, which tends towards the blue end of the electromagnetic spectrum
Street light - A street light or street lamp, also known as a light standard or lamp standard, is a raised light on the edge of a road, turned on or lit at a certain time every night. Modern lamps may also have light-sensitive photocells to turn them on ...
Light The Night Walk - Light The Night Walk is The Leukemia & Lymphoma Society's nationwide evening Walk to build awareness of blood cancers and raise funds for cures. Walkers carry illuminated balloons-white for survivors and red for supporters-to celebrate and commemorate lives touched by cancer.
Column vector - In linear algebra, a column vector is an m × 1 matrix, i.e.
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