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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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Commercial build: Office lighting

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  1.  
    What are the existing ones you want to replace?
    Incandescent/fluorescent/dichroic/paraffin?

    What are they spending now on getting blown bulbs replaced, does the company call out electrician to do it?

    How about motion switches?
    •  
      CommentAuthordjh
    • CommentTimeMay 23rd 2021
     
    What Will says. For example, we need to know a lot more about how they are serviced before deciding whether making them all the same is sensible or not.
    • CommentAuthortony
    • CommentTimeMay 23rd 2021
     
    Very old fluorescent , not serviced at all!
    •  
      CommentAuthordjh
    • CommentTimeMay 23rd 2021
     
    So they don't repair/replace lamps when they fail? They just live with dark spots/rooms?
  5.  
    Tony, if they replace fluorescents with more fluorescents or LEDs, they won't save electricity/carbon/money.

    Is that really what they were hoping? Or do they need replacing anyway, for looks or for emergency lighting?

    Electricity is dramatically less carbon-intensive than it was even a few years ago, so there's less environmental benefits now from scrapping and replacing existing fittings. Just avoid halogen downlighters.
    •  
      CommentAuthordjh
    • CommentTimeMay 24th 2021
     
    Posted By: WillInAberdeenTony, if they replace fluorescents with more fluorescents or LEDs, they won't save electricity/carbon/money.

    I understand what you're saying, but a modern T5 with an electronic ballast may be twice as efficient as an old T12 with magnetic ballast. LEDs can approach the efficiency of a T5 fitting.
    • CommentAuthortony
    • CommentTimeMay 24th 2021
     
    They want to replace existing fluorescents with new LED , I think it is a grid system ceiling

31 to 37 of 37

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