Input-output norms require imported components to match those actually used in exported street lighting fittings. Standard Input-Output Norms set component specifications and admissible input composition for Street Lighting Fittings for export, listing required parts (ballast, capacitor, starter, starter seat, mains terminal, lamp holders, CRCA sheet) with indicative quantities per unit; the entry for this item in Engineering Products was suspended by public notice. Applicants must determine and verify proportions of inputs used in manufacture and ensure imported goods correspond to those used or required in the exported product.