Specifications

• Base Type: BAY15D bayonet base
• Contacts: Dual bottom contacts
• Pin Configuration: Offset locating pins at different heights
• Voltage: 12V (most common automotive application)
• Wattage: Commonly 21/5W dual filament
• Filament Function: Dual filament design for low and high intensity operation
• Also Known As: 1157, P21/5W

Applications

• Tail and Brake Lights: Low filament for tail lights, high filament for brake lights
• Park Lights: Dual brightness functionality for park and driving operation
• Daytime Running Lights (DRLs): Commonly used in dual-function circuits
• Indicator Circuits: Used in selected dual-function turn signal applications
• Trailer and Caravan Lighting: Suitable for various rear lighting functions