Automotive LED lamps 3157 are 100% analog and replacement of incandescent lamps 3157 or P27/7w. The advantage of LED lamps is brighter and whiter light, and low energy consumption compared to an incandescent lamp. Lamps 3157 with a base w2.5x16d, can be used in brake lights, turn signals, parking lights. Basically, this type of lamps is used in American-made cars.