General Electric Company

Elizabeth A Guzowski

Gary Robert Allen

Jianwu Li

David C Dudik

Agoston Boroczki

Viktor Karoly Varga

Svetlana Selezneva

Rocco T Giordano

Amol S Mulay

Robert Baranyi

A lamp is provided having an arctube having a light-transmitting envelope. The arctube is surrounded by a gaseous medium confined by a containment envelope such as a hermetic shroud. The gaseous medium is preferably He or Hor Ne or another gas whose thermal conductivity is greater than that of Nat 800&#xb0; C., or a mixture thereof, to help cool the arctube. The inside and/or outside of the shroud may be coated with a diffusion barrier. To help cool the hot spot of the arctube the gap between the shroud and the envelope can be made small, the portion of the shroud wall near the arc can be thickened, the arctube can be offset above the longitudinal axis of the shroud, and the return lead of the arctube can be located between the shroud and the arctube.

Gas-filled shroud to provide cooler arctube

Growing community of inventors

Cleveland Heights, OH, United States of America

Elizabeth A Guzowski