Wheat Lamp

A wheat lamp is a type of incandescent light designed for use in underground mining, named for inventor Grant Wheat and manufactured by Koehler Lighting Products in Wilkes-Barre, Pennsylvania, United States, a region known for extensive mining activity.

A safety lamp designed for use in potentially hazardous atmospheres such as firedamp and coal dust, the lamp is mounted on the front of the miner's helmet and powered by a wet cell battery worn on the miner's belt. The average wheat lamp uses a 3-5 watt bulb which will typically operate for 5 to 16 hours depending on the amp-hour capacity of the battery and the current draw of the bulb being used.

A grain of wheat lamp is an unrelated, very small incandescent lamp used in medical and optical instruments, as well as for illuminating miniature railroad and similar models.

Famous quotes containing the words wheat and/or lamp:

    The sower scatters broad his seed,
    The wheat thou strew’st be souls.
    Ralph Waldo Emerson (1803–1882)

    ... people were so ridiculous with their illusions, carrying their fools’ caps unawares, thinking their own lies opaque while everybody else’s were transparent, making themselves exceptions to everything, as if when all the world looked yellow under a lamp they alone were rosy.
    George Eliot [Mary Ann (or Marian)