U.S. Philips Corporation

Andreas G Van Veghel

Pieter Postma

Henk Houkes

An electrodeless low-pressure discharge lamp comprising a lamp vessel (1) which is sealed in a vacuum-tight manner and is filled with a metal vapor (for example mercury) and a rare gas, this lamp being provided with a core (4) of magnetic material (for example ferrite), while during operation of the lamp, and electric field is produced in the lamp vessel by means of a winding arranged to surround this core and a high-frequency supply unit connected thereto, the lamp vessel further being provided with an internal transparent conductive layer (11) and an external conductive layer (12), which during operation of the lamp is connected to one of the mains conductors and which together with the internal conductive layer (11) forms a capacitor.

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Eindhoven, Netherlands

Andreas G Van Veghel