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LED C5W coil lamps (coil shaped/festoon) for sign lighting, interior lighting and reading lights. The C5W base is an oblong lamp that sits in clamp brackets and is available in lengths of 31mm, 36mm, 39mm and 42mm. Measure your existing lamp before ordering - the length is crucial for the lamp to...
LED C5W coil lamps (coil shaped/festoon) for sign lighting, interior lighting and reading lights. The C5W base is an oblong lamp that sits in clamp brackets and is available in lengths of 31mm, 36mm, 39mm and 42mm. Measure your existing lamp before ordering - the length is crucial for the lamp to fit.

The C5W socket, also known as a festoon, is the oblong bulb that sits in the roof, trunk, and behind the license plate of most cars. The bulb is clamped between two contact springs and is held in place by its length. That's why choosing the right length is critical - a 36mm bulb won't fit in a 31mm socket.
31mm – most common in interior lighting and passenger compartment lights. 36mm – common in license plate lighting and rear reading lights. 39mm – occurs in some European cars. 42mm – common in license plate lights on German cars. Always measure your existing lamp with a ruler before ordering.
Upgrading to LED provides whiter light and better readability of the license plate, which can also have a positive impact on inspections. Questions? Contact us.