Results 1 to 7 of 7

Thread: Retrofitting T8 tube fixtures to LED

  1. #1
    Join Date
    Apr 2017
    Location
    Saginaw County, MI
    Posts
    1

    Retrofitting T8 tube fixtures to LED

    I will be retrofitting existing T8 fixtures to new LED tubes and pulled the following up during my research. Have any of you dealt with this issue?

    "There is a deeper and more dangerous issue here that few people are aware of. My comments here specifically apply to tubes which are intended to be directly connected to a 120vac source (or branch circuit in UL terms). The tombstone or lampholder MUST BE RATED FOR DIRECT CONNECTION TO A BRANCH CIRCUIT. MOST ARE NOT!!! As of this writing, I don’t believe Leviton has a single holder that is rated to connect to a branch circuit directly. IT IS NOT SUFFICIENT TO SAY THAT BECAUSE A HOLDER IS NON-SHUNTED AND RATED AT SAY 600v AND 600w, it can be used. I have found only 1 manufacturer of holders(Stucchi 3000 series of Italy) that has tested and, in writing, certifies it can be used for DIRECT CONNECTION TO A BRANCH CIRCUIT(although I’m sure there are others since folks are selling retrofit ‘kits’ that contain the tube, holders, and a label) Look at the installation sheet of ANY Leviton tombstone, and the 2nd bullet in the upper left hand corner states it’s not intended for connection to a branch circuit. [The technical reason is that an arcing and sparking hazard exists when the tube fails in a way that produces a partial for full short circuit and high currents are drawn through the tombstone contact where it touches the pin. There are also issues with the physical installation of the tube and exposure of ‘live’ contacts to the installer or the luminaire]Keep this in mind if you choose to do a retrofit using direct connect tubes, or if you hire a contractor to do it for you! You don’t want an accident in your facility number one, and secondly don’t want to find out that your insurer won’t cover you because you did not have the proper tombstone!"

  2. #2
    Join Date
    Feb 2003
    Location
    Minnesota
    Posts
    6,361
    May I suggest googling "ballast bypass t8 LED", or "direct wire t8 LED", or "ballast free t8 LED" and explore the returns.

    There are a lot of non-shunt tombstones, of varying heights, available.

    FYI: Many direct-wire T8 LEDs are sold as kits with tombstones included, but they are generally very short and may be unsuitable for your specific fixture.
    Another Al in Minnesota

  3. #3
    Join Date
    Dec 2006
    Location
    Port St Lucie, Florida
    Posts
    195
    There is T-8 LED lamp that works with the ballast still wired......no retro fitting work required......

    here's a link

    http://gc-lighting.com/categories/tube/

  4. #4
    Where did this article come from?
    Mt. Falls, Va.
    "Not a sermon, just a thought"
    A licensed electrically-related individual

  5. #5
    Join Date
    Feb 2003
    Location
    Minnesota
    Posts
    6,361
    Quote Originally Posted by mtfallsmikey View Post
    Where did this article come from?
    It appears to be a comment on 3/22/17 3:39 PM near the bottom of this page.. At least that's what a simple phrase search resulted. There is still no definitive "provenance" for the ideas.
    Another Al in Minnesota

  6. #6
    Join Date
    Feb 2017
    Location
    Texas
    Posts
    15
    There are 3 different types of retrofits A,B,and C.

    A- uses the existing ballast - existing ballast fails and you have compatibility issues.
    B- direct wire - safety issues, and I have some jurisdictions not allow them.
    C- new led driver, lamps, and sockets - best install but expensive upfront, but less problems over the life of the product.

    Sometimes its easier to sell a new fixture. The customer gets a new lens, and all new components.

  7. #7
    Join Date
    Feb 2017
    Location
    Texas
    Posts
    15
    [QUOTE=ksmith846;1827724]There is T-8 LED lamp that works with the ballast still wired......no retro fitting work required......

    here's a link

    http://gc-lighting.com/categories/tube/[Look at the website, even they admit they compatibility issues and you may be required to change the sockets.

Posting Permissions

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