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Lamp resistance

  1. Jul 8, 2009 #1
    how to calculate lamp resistance and lamp voltage to light up a 18W tubelight?
  2. jcsd
  3. Jul 11, 2009 #2


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    Voltage should be one of the specifications. If the only information we have is 18W, it's impossible to answer this.
  4. Jul 11, 2009 #3


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    And what's a tubelight? Fluorescent? Incandescent?
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