MIL-L-26990B (AMENDMENT-2), MILITARY SPECIFICATION: LIGHT, MARKER, AIRPORT APPROACH, HIGH INTENSITY, TYPE MB-1 (04-AUG-1978)

MIL-L-26990B (AMENDMENT-2), MILITARY SPECIFICATION: LIGHT, MARKER, AIRPORT APPROACH, HIGH INTENSITY, TYPE MB-1 (04-AUG-1978)., This amendment forms a part of Military Specification MIL-L-26990B(ASG), dated 18 April 1967, and is approved for use by all Departments and Agencies of the Department of Defense.