MIL-DTL-3661 Lampholders, Indicator Lights, Indicator Light Housing, And Indicator Light Lenses, General Specification ForThis specification covers the general requirements for lampholders, indicator lights, indicator-light housings, and indicator-light lenses including display and integral lamp driver network types and associated hardware. For the purpose of this specification, an indicator-light housing is an indicator light without a lens \(see 6.5\).