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    welden's Avatar
    welden Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Aug 11, 2013, 10:34 PM
    How many lumens do I need for a gymnasium
    How many 400 watts metal halide do I need for a 7500 square foot gym nasium
    hfcarson's Avatar
    hfcarson Posts: 1,003, Reputation: 49
    Ultra Member
    		  
    #2

    Aug 12, 2013, 04:15 AM
    ... so the number (4) is the universal answer to all the questions in the universe...

    If you would like a better answer, tell us more about the geometry of the space, for example how high is the ceiling? The length x width measurements of the space? If you are in the USA you will be limited by the energy code... is this for school or your job?
    sinnadurai's Avatar
    sinnadurai Posts: 127, Reputation: 2
    Junior Member
    		  
    #3

    Aug 12, 2013, 11:03 PM
    Refer publications from illumination engineers society for illumination level(lux)required for a gymnasium and calculate. If you make a mistake you may get fired so go to an illumination engineer & get trained.
    hfcarson's Avatar
    hfcarson Posts: 1,003, Reputation: 49
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    #4

    Aug 13, 2013, 04:12 AM
    or you could assume that the energy code (if you are in USA) would force you to remain somewhat conservative in the amount of light you'll be allowed to install...
    ASRAE90.1 - Gym Playing area = 1.4 va/sq ft * 7500 sq ft = 10,500 va
    10,500 va / 500 watts per fixture (assume boyfriend = 1.2) = 21 fixtures...
    Now the disclaimer - you did not give us enough information which makes anything with a variable impossible... if you follow up on your question I'm sure we could both learn something...
    sinnadurai's Avatar
    sinnadurai Posts: 127, Reputation: 2
    Junior Member
    		  
    #5

    Aug 13, 2013, 04:29 AM
    Won't the height of the gym,types of surface of walls,floors etc play any role in the evaluation?
    hfcarson's Avatar
    hfcarson Posts: 1,003, Reputation: 49
    Ultra Member
    		  
    #6

    Aug 13, 2013, 06:21 AM
    Absolutely! An unwritten part of the disclaimer. (21 fixtures is just the maximum
    Allowed by the code regardless of other necessary considerations.)

    It's a shame so many never follow up on their questions...
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