Invention Application
US20050073256A1 150W-1000W MasterColor® ceramic metal halide lamp series with color temperature about 4000K, for high pressure sodium or quartz metal halide retrofit applications 失效
150W-1000W MasterColor(R)陶瓷金属卤化物灯系列,色温约4000K,用于高压钠或石英金属卤化物改性应用

150W-1000W MasterColor® ceramic metal halide lamp series with color temperature about 4000K, for high pressure sodium or quartz metal halide retrofit applications
Abstract:
The invention relates to a high-pressure discharge lamp of the ceramic metal halide type of the Philips MasterColor® series having power ranges of about 150 W to about 1000 W. Such lamps are provided with a discharge vessel which encloses a discharge space. The discharge vessel has a ceramic wall and is closed by a ceramic plug. An electrode which is located inside the discharge space is connected to an electric conductor by way of a leadthrough element. The leadthrough element projects through the ceramic plug with a close fit and is connected thereto in a gas-tight manner by way of a sealing ceramic. The leadthrough element has a first part which is formed by a cermet at the area of the gas-tight connection. In addition, the lamps display one or more and most preferably all of the following properties: a CCT (correlated color temperature) of about 3800 to about 4500 K, a CRI (color rendering index) of about 70 to about 95, a MPCD (mean perceptible color difference) of about ±10, and a luminous efficacy up to about 85-95 lumens/watt, a lumen maintenance of >80%, color temperature shift
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