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Powerful Underground Light Hangs Clear

Thursday, September 22, 2011

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Larson Electronics’ Magnalight has introduced an innovative manhole entry light for use in a wide variety of underground and enclosed work spaces

The Magnalight MMLP-1MLED Temporary Manhole Mount Light Fixture is designed to illuminate large underground areas and is approved for use in enclosed spaces.

The fixture produces 10,000 lumens of light in a wide flood pattern while drawing only 150 watts and can be operated with voltages of 120 VAC to 277 VAC.

Operator Usage

Constructed of aluminum and steel, the light is designed for years of operation with low maintenance costs and minimal deployment effort.

Magnalight MMLP-1MLED Temporary Manhole Mount Light Fixture

A 16-inch LED light head constructed of copper-free aluminum attached to a 21-inch man-way support bracket allows the light to be dropped into place on standard-sized manholes and entryways used on underground sewer and drainage lines, storage tanks and railcars.   

The light fixture then hangs in place below the entryway, creating a high-power light source that does not interfere with the work space, according to the manufacturer.

Larson says the fixture “provides operators in hazardous enclosed locations with a highly convenient and easily deployed explosion-proof lighting solution.”


Light from the fixture has a color temperature of 6000K and a color rendering index of 70, making it suitable for close work applications that require good color rendering and strong contrast, according to Larson. The LED light head has a 60,000-hour rated lifespan with 80% lumen retention and creates far less heat than HID or halogen-equipped lights.

The unit is rated Class 1, Division 1 & 2 Groups C and D; Class 2, Division 1 & 2 Groups E, F, G; and Class 3, making it suitable for a wide variety of hazardous locations where gases, vapors and dusts are present. The light can also be configured with an explosion-proof 50- or 100-foot reel.

Rob Bresnahan, of Larson Electronics’, said the concept of lowering the 150-watt LED light source into a tank, silo, rail car or storage area “is appealing to operators for inspection and cleaning.”

He adds: “In any case, LED lighting is more conducive to inspection and hazardous-area lighting than halogen or incandescent; and with 150 watts of LED power, operators can exceed the light output of standard high-powered quartz or halogen lamps with much more durability and longevity.”
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Tagged categories: Confined space; Equipment; Health and safety; Larson Electronics; Lighting; Manholes

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