| 摘要 |
A sealed light fixture having a valve mounted in the housing to vent pressure that builds-up inside the housing during operation of the light and to prevent moisture and contaminants from entering the housing. The light fixture automatically creates a vacuum inside the housing to prevent condensation from causing corrosion and other problems for the light fixture. The pressure releasing mechanism permits easy installation of the housing cap and avoids damage to the fixture as a result of temperature caused pressure increases. The valve has a pressure equalizing mechanism that can be manually actuated to eliminate the vacuum and equalize the pressure inside the housing with the atmosphere so the housing can be disassembled and the lamp replaced when necessary.
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