The 99 Line Hybrid is a self testing, self diagnosing emergency lighting fixture specifically designed for the NYCTA Subway System to provide code compliant illumination during power interruption. The Hybrid EM technology provides uninterrupted light powered directly off the 600VDC third rail as the first backup stage, while the local rechargeable batteries provide a minimum of 4 hours of illumination in the event of a catastrophic power failure. With self testing every 30 days, battery maintenance indicators and programmable output, the 99 Line Hybrid is the most complete emergency lighting solution for railway installations available today.