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 min upon interruption of normal power.