Results 1 to 7 of 7

Thread: LED payback

  1. #1
    Join Date
    Jun 2003
    Location
    NE (9.1 miles @5.07 Degrees from Winged Horses)
    Posts
    5,579

    LED payback

    I saw some LED fixtures a week or so ago that impressed me so I had the rep price them for a project we are working on. Thought maybe I could upgrade the fixtures as an option with customer paying the difference. You think they might go for 140K more than the existing 140K for the whole project? LEDs have a ways to go yet.
    Tom
    TBLO

  2. #2
    Join Date
    Feb 2003
    Location
    Seattle, WA
    Posts
    16,715
    The potential payback for LEDs comes from the added length of time between replacement of the bulbs. You need to do a Life Cycle Cost Analysis (LCCA), in order to get the entire picture.
    Charles E. Beck, P.E., Seattle
    Comments based on 2008 NEC unless otherwise noted.

  3. #3
    Join Date
    Jun 2011
    Location
    Oregon
    Posts
    176
    If they are interior lights they will never produce an ROI. I can do the math for you if you like, but long life T8 is the way to go.
    I know lots about lightbulbs!

  4. #4
    Join Date
    Jun 2003
    Location
    NE (9.1 miles @5.07 Degrees from Winged Horses)
    Posts
    5,579
    I have done the ROI calculations to compare fixtures in the past. Usually T5, T8, & MH comparisons. I am with you that T8s usually come out ahead. Once I heard the price for the LEDs I didn't even bother. My WAG is that payback is not there, given the operational hours, even at half the price.
    Tom
    TBLO

  5. #5
    Join Date
    Aug 2010
    Location
    Saint Joe, Arkansas
    Posts
    124

    LED may have arrived.

    DOE sponsered a retrofit of some Smithsonian Exhibition halls from incandescant and halogen to LED track heads. The report link is below.

    http://apps1.eere.energy.gov/buildin...mithsonian.pdf

    At 14 cents per kwh they got a payback of 1.6 years without a significant change in lighting levels and appearance.

  6. #6
    Join Date
    Jun 2011
    Location
    Oregon
    Posts
    176
    Quote Originally Posted by BullsnPyrs View Post
    DOE sponsered a retrofit of some Smithsonian Exhibition halls from incandescant and halogen to LED track heads. The report link is below.

    http://apps1.eere.energy.gov/buildin...mithsonian.pdf

    At 14 cents per kwh they got a payback of 1.6 years without a significant change in lighting levels and appearance.
    LED works well lighting jewelry and exhibits. It creates "sparkle" which CFL is really horrible at. Applying an ROI in these situations seems a little unfair because LED isn't really giving a cost savings, it's also providing an ambience that CFL cannot.
    I know lots about lightbulbs!

  7. #7
    Join Date
    May 2003
    Posts
    318
    Be sure that you are comparing apples to apples. Are you talking a generic lensed troffer against an LED fixture? Probably no payback there, but if you are on a LEED or IECC project that requires dimming and/or the client wants a higher end look than a lensed troffer the fixture price can be the same since LED fixtures generally have dimming built-in whereas with T8 it is an add-on.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •