US Patent 7284877 Industrial light fixture with spring-spacer apparatus

An industrial light fixture of the type including a housing with a base member and a top member and containing power-related components includes spring-spacer apparatus between the base member and the ballast, such that, with the top member closed with respect to the base member, the spring-spacer apparatus biases the ballast into heat-exchange engagement with at least one surface of the top member and provides an air gap between the ballast and the base member. The base member and top member are preferably formed of die-cast metal and a variety of preferred features are disclosed.