These 921 LED lights is the most common size reverse light and works in most vehicles (please confirm it will fit your vehicle before ordering). They are also used for 3rd brake light and cargo lights on most trucks. They are also a common size bulb for marker lights, boat lights or many RV/Campers
On average these bulbs are 3 x brighter than a stock replacement. Due to their 6000k color they are also much more effective with backup cameras.