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  2. Lumen maintenance - Wikipedia

    en.wikipedia.org/wiki/Lumen_maintenance

    Lumen maintenance compares the amount of light produced from a light source or from a luminaire when it is brand new to the amount of light output at a specific time in the future. For instance, if a luminaire produced 1,000 lumens of light when it was brand new and now produces 700 lumens of light after 30,000 hours, then it would have lumen ...

  3. Parts washer - Wikipedia

    en.wikipedia.org/wiki/Parts_washer

    Parts washers were originally developed for use in automotive transmission and engine repair shops as a way to improve the function of simple soak tanks.Soak tanks are vats filled with a mixture of water and detergent, which take hours to "soften" the built-up road grime, fluids, tars and oils enough to be manually rinsed off prior to disassembly and repair.

  4. Agitator vs. Impeller: Which washer type is best? - AOL

    www.aol.com/news/agitator-vs-impeller-washer...

    1. Maytag MVW6230HC top load washer. Smart features and a Heavy Duty cycle makes this a great all-rounder. Washer capacity: 4.7 cubic feet | Max spin speed: 750 rpm | ENERGY STAR certified: No ...

  5. Luminous efficacy - Wikipedia

    en.wikipedia.org/wiki/Luminous_efficacy

    Luminous efficacy can be normalized by the maximum possible luminous efficacy to a dimensionless quantity called luminous efficiency.The distinction between efficacy and efficiency is not always carefully maintained in published sources, so it is not uncommon to see "efficiencies" expressed in lumens per watt, or "efficacies" expressed as a percentage.

  6. List of automotive light bulb types - Wikipedia

    en.wikipedia.org/wiki/List_of_automotive_light...

    for e.g. dash lights, gauge cluster backlights. Similar in size to W3W if with a T10 base. PC74 T1-3/4 (if removable) or fixed to holder [9] 1 14 V / 1.4W Used on circuit boards for e.g. dash lights, gauge cluster backlights.

  7. Birmingham gauge - Wikipedia

    en.wikipedia.org/wiki/Birmingham_gauge

    The Birmingham gauge is also known as the Stubs Iron Wire Gauge or Birmingham Wire Gauge and is distinct from the Stubs Steel Wire Gauge and the British Standard Wire Gauge. It is commonly referred to simply as gauge (abbreviated as G ), [ 3 ] but this should not be confused with the French gauge , a separate system used for measuring the outer ...

  8. Lumen (unit) - Wikipedia

    en.wikipedia.org/wiki/Lumen_(unit)

    The lumen (symbol: lm) is the unit of luminous flux, a measure of the perceived power of visible light emitted by a source, in the International System of Units (SI). Luminous flux differs from power ( radiant flux ), which encompasses all electromagnetic waves emitted, including non-visible ones such as thermal radiation ( infrared ).

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