The lens says "logic power".
A light, with mounting facilities furnished, designed to convey information of a specific nature concerning the circuit in which inserted. Must include or provide for the use of a lens as a part of it. For items without a lens, see lampholder, and also see light (1), panel.
Classification: Electric lamps and lighting fittings, nesoi
NSN 5895-01-542-6163
NSN 6105-01-242-4872
NSN 5915-00-808-9785
NSN 5920-01-027-0660
NSN 5835-00-851-6470
NSN 5835-01-459-8664
NSN 5895-01-592-1964
NSN 5920-00-144-8031
NSN 5925-01-234-7187
NSN 5998-01-567-1279
NSN 6620-01-590-7035
NSN 5835-01-346-1386