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Retrofit light emitting diode tube

  • US 7,053,557 B2
  • Filed: 09/25/2003
  • Issued: 05/30/2006
  • Est. Priority Date: 11/30/2001
  • Status: Expired due to Term
First Claim
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1. An LED light tube for replacement of a fluorescent light tube, the LED light tube comprising:

  • an elongated, cylindrical transparent envelope;

    a base cap at each end of the envelope, wherein the base cap comprises a first prong and a second prong extending from the base cap;

    at least one serial string of LEDs in electrical communication with the base cap having circuitry means for connection with an AC source through a nondissipative voltage dropping element, wherein each one of the at least one serial string of LEDs are connected in parallel with the other and are enclosed in the envelope; and

    a varistor positioned in parallel with the at least one serial string of LEDs.

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