CBP applies the GRI 2(a) rule, under which an incomplete or unfinished article is classified as the complete article if it has the essential character of the finished good. A portable lamp housing with a bulb socket and switch installed may already have the essential character of a complete lamp, even without batteries or a lens. Importers assembling lamps from imported parts should obtain a binding ruling if the degree of completion at import is borderline.

Switzerland and the UK supply precision optical and mechanical components — such as high-tolerance reflectors, lens assemblies, and specialized switch mechanisms — used in professional, industrial, or tactical portable lighting rather than mass-market consumer flashlights. These specialty components command higher unit values and serve niche segments where performance specifications outweigh cost considerations.