Patent ID: 6833677
Filing Date: 2004-12-21
Classification: H01J

Abstract:
A discharge lamp comprising a ceramic discharge vessel enclosing a discharge space, said discharge vessel including within said discharge space an ionizable material comprising a mixture of metal halides, 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;said discharge vessel having a fill containing a salt mixture comprised of sodium iodide, calcium iodide, thallium iodide and one or more rare earth iodides; said lamp having a power range of about 150 W to about 1000 W and exhibiting (a) one or more of a characteristic selected from the group consisting of a CCT (correlated color temperature) of about 3800 to about 4500K, a CRI (color rendering index) of about 70 to about 95, a MPCD (mean perceptible color difference) of about Â±10, and (b) a luminous efficacy up to about 85-95 lumens/watt.