Patent ID: 7331837

Claim:
A method for the design and construction of a discharge lamp having a molybdenum coil wrapped around the discharge vessel and at least a portion of the electrode feed through means, and having a power range of about 150 W to about 1000 W and comprising a ceramic discharge vessel enclosing a discharge space, said discharge vessel including within said discharge space an ionizable material comprising a metal halide, a first and second discharge electrode feedthrough means, and a first and second current conductor connected to said first and second discharge electrode feedthrough means, respectively; which method comprises the steps of predetermining characteristics of the discharge lamp including the dimensions of the arc tube of the discharge vessel and the electrode feedthrough means structure using a design space of predetermined parameters comprising at least one of the following parameters: (i) the arc tube length, diameter and wall thickness limits of said discharge lamp correlated to and expressed as functions of lamp power, and/or color temperature, and/or lamp voltage; and (ii) the electrode feedthrough structure limits used to conduct electrical currents with minimized thermal stress on the arc tube correlated to and expressed as a function of lamp current.