The PSQ500 Is Designed to Fit In The Tightest Of Applications, Including Low-Profile Lensed Troffers, Downlighting and Industrial Lighting Fixtures. They Also Feature An Innovative Quick-Disconnect Wiring Harness That Makes Field Maintenance and Upgrades Quick and Easy. Factory or Field Installed Inside or Outside (Field Only) Fluorescent Fixture to Operate Lamp(S) At Reduced Light Output, Providing Optimum Glare-Free Illumination For A Minimum Of 90 Minutes Upon Interruption Of Normal Power. The Nominal 5