At what battery level percentage do battery backup system manufacturers claim that switching to red flashing operation significantly extends run time?

Manufacturers of battery backup systems typically indicate that switching to a red flashing operation at 40% battery level can significantly extend run time. In this mode, the signal operates in a manner that consumes less power than continuous green or yellow signals, thus conserving energy and allowing the system to function longer during power outages or low battery conditions.

Operating in red flash mode is strategic, as traffic signal systems can still effectively manage traffic flow while minimizing power consumption. This is critical for maintaining safety and reducing the risk of accidents at intersections during extended outages. The operational efficiency achieved by reducing energy use at this critical percentage allows these backup systems to prolong their operational life when necessary, making it a recommended practice for traffic signal management.