I recently had seen an article in the news about an effort to install backup power to traffic lights for public safety. The statistics I have seen show fairly conclusively that accidents increase as a result of dark traffic signals in a power outage. This is an application where off grid lighting can excel. Because of the efficiency of LEDs and advances in battery technology, an LED traffic light can be designed with an integrated backup battery and the intelligence to continue operating seemlessly through the outage. Eliminating dark signal situations at an intersection for a reasonable cost can really help reduce accidents and be a public safety success story.