This 12V 20/5 W lamp is suitable for use in classic vehicles, specifically Citroën 11CV and 15CV models. The lamp provides two power levels: a higher setting for main lighting and a lower setting for position or rear light. The construction focuses on stable light output and reliable operation at the specified voltage. The base fits the common sockets used in these vehicles. The glass and filament are designed for even light distribution. The lamp supports visibility in traffic and basic safety under different driving conditions.