The LED lighting tube has been designed to work with conventional MIL-DTL-16377 fluorescent fixtures in order to replace the short lived fluorescent lamps and ballasts that are typically used in interior lighting. The LED tube works with or with out external ballast.This lamp is suitable for use in all M16337/8, /11, /12, /44*, /57, /72*, /73, /74, /75, /77, /80, /81, & /83 fixtures.