U.S. Philips Corporation

Theodorus P Kandelaars

Max L Renardus

Cornelis A Jacobs

Samuel A Carleton

The high pressure discharge lamp has an elongate discharge vessel of ceramic material. The outside surface area of the wall of the discharge vessel is strongly increased by a relief. Since a higher heat flow from the discharge vessel to the environment is possible, the lamp can withstand a higher load. In this way, lamp properties such as luminous flux, color rendering index and/or color temperature can be improved.

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Eindhoven, Netherlands

Theodorus P Kandelaars