Power Sentry batteries fit in the tightest of applications, including low-profile lensed troffers, down lighting 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-install inside or outside (field only) fluorescent fixture to operate lamp(s) at an initial output of 10% to 95% of rated lamp lumens, providing optimum, glare-free illumination for 90 minutes upon interruption of normal power.