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What would cause a bulb to go completely black

Discussion in 'Landscape Lighting' started by gusbuster, Jan 3, 2007.

  1. gusbuster

    gusbuster LawnSite Bronze Member
    Messages: 1,926

    I was doing a repair on a homeowner installed low voltage lighting system. I at first couldn't figure out why there were no lights working. First I checked the transformer for juice, then output, then the lines and finally the fixtures itself.

    I went to pull out the bulb, the first thing I noticed that it was black(like burned) but I know it was working because it burnt the heck out of my index finger. The question would be why would a bulb burn from the inside causing no light to be emitted? The only thing that I can figure is it probably could do with the spider webs that I cleaned out of the fixtures.
  2. eskerlite

    eskerlite LawnSite Member
    Messages: 222

    The black color means air entered the bulb some where. When gases meet air in the bulb, black is the result.
    Sean C.

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