This style light was used to signal a Derail switch or used when a Locomotive or car was being worked on an can not be moved. This is the Starlite model 215TL. It requires a 6 volt lantern battery (not included).
The Conrail 6 Volt Flashing Blue Lantern derail or stop do not move flag lamp is suitable for train yards or other areas where preventing accidents due to train movement is of utmost importance.
