When AC power fails, the Sure-Lites Emergency Battery Pack LED (EBP) automatically switches to emergency mode. The EBP maintains illumination of an LED fixture for a minimum of 90 minutes. The product line is UL924 classified for field retrofit installation and has guaranteed compatibility with Eaton LED fixtures with accessible LED drivers. The constant power feature ensures consistent light output of the fixture for 90 minutes. The EZ Key and laser test features simplify maintenance and installation. These products are not for use with sealed and gasketed fixtures.