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  1. #1
    Join Date
    Aug. 22, 2005

    Default How much light is in a lumen? (Yard light factor)

    I've been using ordinary 150 watt (1650 lumens, 2000 hours) outdoor floodlight bulbs in my yard lights.

    But when I went to stock up on bulbs for the winter, all I could find (in two "big box stores") was Halogen 100 watt outdoor floodlights (1500 lumens, 2000 hours).

    How much difference is 150 less lumens going to make? Should I use the Halogens in areas where light doesn't have to reach so far?

    Any other pros/cons of Halogen, other than they cost more than the others did?

  2. #2
    Join Date
    Oct. 2, 2007
    Beyond the pale.


    IME, you will find it dim. We noticed a real difference when we switched from 1000 lm bulbs to 1200 lm bulbs in our stalls. ( we use compact fluorescents tho)Much brighter!
    Halogens usually last longer and use less electricity for the same amount of light, than ordinary incandescent floodlights. I don't know why the ones you bought are only rated 2000 hrs.
    "The Threat of Internet Ignorance: ... we are witnessing the rise of an age of equestrian disinformation, one where a trusting public can graze on nonsense packaged to look like fact."-LRG-AF

  3. #3
    Join Date
    Jan. 17, 2008


    A lumen is the light of one candle. (the word luminaire is derived from it).

  4. #4
    Join Date
    May. 12, 2000
    NE TN, USA


    You'd have to do a side-by-side comparison to notice the difference. There's usually a +/- 5% tolerance (or more) on light output because of manufacturing variations.
    The inherent vice of Capitalism is the unequal sharing of blessings. The inherent virtue of Socialism is the equal sharing of miseries.
    Winston Churchill

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