Switches are malfunctioning on these so they are no good for a light but good to fill up survival kits for display or costume or theater. Survival light clips on to pilots harness for emergency rescue or light. New and original military issue. Requires 1 D-size battery (not included). PILOT'S EMERGENCY LIGHT. P/N B250-1000. Manufactured in 1986. NOTE: SWITCHES ARE BUSTED> LIGHT WILL NOT WORK!!!