Non-polarity. Can be used for brake lights, tail lights, stop lights, parking light, daytime running light, turn signal light, etc. Some sensitive vehicles will meet canbus issue after installing, load resistors or flasher relay will be required to solve these issues, you can contact us through Amazon Buyer Message to get help and solutions | Low power and high brightness. 5.5W per 1156 led red bulb. Only 1/4 energy consumption of original 1156 red bulb but 4 times brighter. Built in smart IC driver ensure constant current, no radio interference. Plus instant-on capability with zero warm-up time | Unique imitated halogen shape design. Resembling halogen bulb shape design and sequencing 54 pieces 4014-SMD LED chips precisely around the light. Delivering 360° high luminous efficiency with full brilliant red light, easier to be noticed and safer to drive | Small size comparable to OEM 1156 bulbs. Non-polarity, applied to US standard and CK sockets. Fits: BA15S 1156 7506 1003 1141 P21W 1073 1093 1129 1147 199 1159 1259 1295 1383 1459 1619 1651 1680 2056 3496 5007 5008 7008 7806 7527 1759 3497 etc. Amazon filter system may not be 100% accurate or up to date, if you are not sure which bulb model fit your vehicle, please check your vehicle owner manual to confirm or ask a question for help | Electroplating process housing. Improves oxidation resistance and produces less heat. High-end styling, matching great in the assembly. Ideal replacement for your halogen 7506 red bulbs