Partsam 4x Xenon White 42MM 4SMD Error Free festoon LED Bulbs Car Interior Lights 4-5050-SMD 12V Manufacturer Part Number: 561 562 564 570 571 577 578 211-2 212-2 214-2 33423 3425 6413 6429 6451 LED Type: 4-5050-SMD, Canbus Error Free Color: White, Size: 42mm Festoon Applications: Interior Dome Map Lights (may also suit for courtesy trunk cargo light) If the bulbs do not light up, please reverse it 180 degree, as it's polarity sensitive Partsam all started in the summer of 2013 with a simple, with bold idea: makebetter auto parts. In other words, not just a better auto parts - a better way of doing things. A new kind of auto company that works hand in hand with users to do something amazing, something meaningful.Now PARTSam has grown tremendously to become one of the leading platforms of e-Commerce in the aftermarket auto parts industry. Inventory Management/Warehouse &amp; Fulfillment  With our warehouse located in Milpitas, California, we take care of the inventory management for our products. This saves manufacturers space, time, and headache. Automated Multi-Channel Sales  We successfully advertise our products on multiple platforms and maintain top-rated healthy seller accounts, which keep customers drawn to our products. We arecontinually expanding our customer base as we add more sales channels. Professional Seller-Customers will deal directly with us in regards to issues and concerns they experience with the products. Manufacturers will not have to deal directly with the individualcustomers, but will experience the benefits of their business, which is the typical win-win cooperation. Light Color: White Dimension: 42MM Super Bright White LED Input: 12V LED Type:4-5050-SMD Package Content: 4 x White 42mm Festoon Bulbs Made with bright light bead,Stable light body structure, not easy to damage or disintegration Interior usage: Map lights, dome lights, cargo lights, courtesy lights Built-in Circuit for 12V DC Power Input Each bulb contains 4 pcs Ultra White 5050 SMD LED Each bulb contains Heat Sink to prevent Overheat Built-in Canbus controller, no bulb out error, no flickering 578, 211-2, 212-2, 214-2,569, 211, 211-2, 212, 212-2, 214-2, 569, 578, 6413, 6429, 12844, DE4410 If the LED does not light up, simply rotating it 180 degrees (reverse the polarity)