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Method of making a plasma lamp

  • US 7,396,271 B2
  • Filed: 04/26/2005
  • Issued: 07/08/2008
  • Est. Priority Date: 03/30/2001
  • Status: Expired due to Fees
First Claim
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1. A method of making a high intensity discharge lamp having a vaporizable fill material of one or more metal halides forming a light emitting plasma during operation of the lamp, said method comprising the steps of:

  • selecting a fill material comprising halides of sodium, scandium and thorium; and

    filtering the light emitted from the plasma,so that the operating characteristics of said lamp include a lumens per watt greater than about 85, a color rendering index greater than about 80, and a correlated color temperature between about 3000°

    K. and about 6000°

    K.

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