Page 1 of 3 123 LastLast
Results 1 to 10 of 22

Thread: How long should Metal Halide ballasts last?

  1. #1
    Join Date
    May 2005
    Location
    Tacoma, WA
    Posts
    165

    How long should Metal Halide ballasts last?

    I saw hambone1216's post on metal halide lamps, and it made me think of the ballasts for these lights.

    I installed (6) 400W metal halide high bay lights back in 2005 (about 3 1/2 years ago). Four (4) of the lights stopped working. We tried new lamps, but they still didn't work. So, we replaced the ballasts. This fixed the lights, but it's awfully expensive.

    I have two questions. One, how long should a typical metal halide ballast last? And two, do you guys typically get a ballast rebuild kit? Or do you troubleshoot the light, and replace just the capacitor or other components in the light fixture? I've always just replaced everything, but that's usually after the lights been in service for a MUCH longer time than 3 1/2 years!

    Thanks!

    Andrew

  2. #2
    Join Date
    Nov 2006
    Location
    Pinellas County, FL
    Posts
    1,468
    3 1/2 years life seems kinda short!
    ____________________________

  3. #3
    Join Date
    Feb 2003
    Location
    Bremerton, Washington
    Posts
    6,577
    Three years is about right, maybe a bit long for HID lamps. If you look in the lamp catalogs, for example it will list 15,000 hours. This is the average life, and at that life you will have 50% failure, of course depending on the burn time. Dusk to dawn is 4,000 hours per year.
    So typically we will relamp every two years. Pulse start HIDs will last longer.
    Moderator-Washington State
    Ancora Imparo

  4. #4
    Join Date
    Jun 2005
    Location
    North Logan, Utah
    Posts
    7,939
    I agree that 3 years for an HID lamp is about right, but the ballast should last longer than that.

    Chris

  5. #5
    Join Date
    Mar 2009
    Location
    Houston
    Posts
    42
    90% of the time it's the capicitor not the ballist

  6. #6
    Join Date
    May 2005
    Location
    Tacoma, WA
    Posts
    165
    I was referring to the ballast, not the lamp. A ballast SHOULD last longer than 3 1/2 years, but how long SHOULD they last? 5 years? 10 years?

    If the capacitor is bad, what's the best way to test them?

    Thanks for the quick reply guys!

  7. #7
    Join Date
    Nov 2006
    Location
    Pinellas County, FL
    Posts
    1,468
    Quote Originally Posted by buzzbar View Post
    If the capacitor is bad, what's the best way to test them?
    I really should not answer the way that first came to mind!
    ____________________________

  8. #8
    Join Date
    Dec 2005
    Location
    WI & AZ
    Posts
    1,961
    I always replace the whole ballast assemby, ie ignitor, capacitor, ballast out of habit. It was the way I was taught and never questioned it. In reality, I suppose if the cap was bad, one could just replace it but then is the ignitor going to fail next week?
    Tom

    " And all the science I don't understand, it's just my job five days a week "

  9. #9
    Join Date
    Mar 2009
    Location
    Houston
    Posts
    42
    Place annalog meter across the terminals the needle should spike and rest back to zero

    [QUOTE=buzzbar;1041613]
    If the capacitor is bad, what's the best way to test them?

    QUOTE]

  10. #10
    Join Date
    Dec 2006
    Location
    Eastern Oregon
    Posts
    2,668
    Quote Originally Posted by A/A Fuel GTX View Post
    I suppose if the cap was bad, one could just replace it but then is the ignitor going to fail next week?
    Yep, when the customer calls you back 2 weeks later, that is all they're going to remember, is you didn't fix it right the first time. Not worth the hassle. Replace the ballast and lamp and know it'll be a long time before you'll have to work on it again.

Posting Permissions

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