Explanatory notes
… and a filament sealed within a gas‑filled or vacuum‑type lamp. (B) OTHER FILAMENT LAMPS, EXCLUDING ULTRA‑VIOLET … pressure; in the base, which may be of the screw or bayonet type for fixing in the lamp‑holder, are the necessary … do not have a cap (base) (e.g., screw, bayonet or bi-pin type) for fixing in the lamp-holder. These modules may have …