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The light output of lanterns is quantified by lumens. Models around 100 lumens only provide enough light for personal use and ambient light; larger groups will want something in the 400 range.
By comparison, a 60-watt household incandescent lamp will produce about 900 lumens. The luminous efficacy or lumens produced per watt of input of flashlight bulbs varies over the approximate range of 8 to 22 lumens/watt, depending on the size of the bulb and the fill gas, with halogen-filled 12-volt lamps having the highest efficiency.
A kerosene lantern, also known as a "barn lantern" or "hurricane lantern", is a flat-wick lamp made for portable and outdoor use. They are made of soldered or crimped-together sheet-metal stampings, with tin-plated sheet steel being the most common material, followed by brass and copper. There are three types: dead-flame, hot-blast, and cold-blast.
A lantern is a source of lighting, often portable. It typically features a protective enclosure for the light source – historically usually a candle, a wick in oil, or a thermoluminescent mesh, and often a battery-powered light in modern times – to make it easier to carry and hang up, and make it more reliable outdoors or in drafty interiors.
A Coleman white gas lantern mantle glowing at full brightness. An incandescent gas mantle, gas mantle or Welsbach mantle is a device for generating incandescent bright white light when heated by a flame. The name refers to its original heat source in gas lights which illuminated the streets of Europe and North America in the late 19th century.
Both the Eveready and Energizer marks are used under license by auto parts magnate Pep Boys for their in-house car batteries. [55] The Energizer logo used by Pep Boys is similar to the 1980s-era logo first used with the consumer dry cell batteries. Both Eveready and Energizer are marketed as different brands in some markets in Asia.