The ECO-BAL500TD converts new or existing fluorescent fixtures into emergency lighting, offering a 500-lumen output and dual 120/277V voltage input. It features a 2.4V NiCd battery with a time-delay enhancement and can be installed inside, on top, or remotely on compatible fixtures. This ballast is designed for switched and unswitched fixture use, and is constructed from durable painted steel in a compact form factor.