The current lighting mechanisms enable globe lights, with no supported method to create directional / spot lights. This has resulted in 1.60 and 1.62 mod / other content creators are creating linkages based on undocumented class functionality to circumvent gaps in the ARMA 3 API.
Request is to expose the existing class capabilities to establish a spotlight through ARMA scripting commands.
Tilion confirmed the functionality exists in the engine in July 2013:
Example community requests for this functionality:
This has been raised as a feature with no BI response for literally years: