Explanatory notes
… gas under low pressure; in the base, which may be of the screw or bayonet type for fixing in the lamp‑holder, are the … connected. These modules do not have a cap (base) (e.g., screw, bayonet or bi-pin type) for fixing in the … to a level useable by the LEDs and a cap (base) (e.g., screw, bayonet or bi-pin type) for fixing in the …