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  1. #1
    Join Date
    Aug. 22, 2005
    Posts
    3,788

    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
    Location
    Beyond the pale.
    Posts
    2,957

    Default

    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
    Location
    New England
    Posts
    2,002

    Default

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



  4. #4
    Join Date
    May. 12, 2000
    Location
    NE TN, USA
    Posts
    6,213

    Default

    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.
    “There are two ways to conquer and enslave a nation. One is by the sword. The other is by debt.”
    John Adams



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