Partsam 2pcs SUPER Blue LED 4SMD Error Free 42MM Car Interior Dome Map Lights 5050 SMD 12V Manufacturer Part Number: 561 562 564 570 571 577 578 211-2 212-2 214-2 Applications:Car Interior Dome/map/trunk/cargo/step/courtesy light (pls check your OEM lamps for sure) Lamp Size: 42mm Festoon (will replace 42-44mm lamps) LED Type: Error Free 4-5050-SMD, Volts: 12V If the bulbs do not light up, please flip 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. Color: Blue Bulb Size: Length: 41.5mm, Width:12mm Built-in Circuit for 12V DC Power Input Each bulb contains 4 pcs Ultra Blue 5050 SMD LED Each bulb contains Heat Sink to prevent Overheat Built-in CAN-bus controller, no bulb out error, no flickering Cross reference parts#: 211-2, 212-2, 214-2, 560, 569, 578 <span class="a-text-bold"> Package Contents:</span>
2 pieces Ultra Blue 4-SMD Error Free 41mm 578 LED bulbs with built-in Can-bus load resistors Faster response time,No incandescent delay Exterior usage: License plate lights, tail lights Interior usage: Map lights, dome lights, cargo lights, courtesy lights Made with bright light bead,Stable light body structure, not easy to damage or disintegration 578, 211-2, 212-2, 214-2,569, 211, 211-2, 212, 212-2, 214-2, 569, 578, 6413, 6429, If the LED does not light up, simply rotating it 180 degrees (reverse the polarity) Fits the car models, please see compatibility chart;