The aircraft light signal armature SLM-61 is designed to provide light signals about aircraft flight modes and the operation of individual units and systems, as well as for internal light signaling on control panels. 
The armature provides brightness control of the light signal for night and day flight conditions.

Specifications: 16.535.062-81.

The manufacturer guarantees the serviceability of the valve for 2,000 flight hours for 4.5 years of operation and 2 years of storage in warehouses, but no more than 6.5 years from the date of acceptance of the product by the customer's representative.