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 rich earth, of its own self made rich,
Fertile of its own leaves and days and wars,
Of its brown wheat rapturous in the wind,
The nature of its women in the air,
The stern voices of its necessitous men,
This chorus as of those that wanted to live.”
—Wallace Stevens (1879–1955)
“Life is the lust of a lamp for the light that is dark till the dawn
of the day when we die.”
—A.C. (Algernon Charles)