Genssi Red LED 1157 2057 18 SMD LED Bulbs Signal Tail Brake Bulb (Pack of 2) Genssi 1157 LED Bulbs are designed to replace your regular bulb with a RED LED that lasts 10x longer; gives less heat and provides a more Red color you can notice right away 1157 Bulbs are dual filament by nature, this means there is On / Off and / On Dim; There are two contacts at the bottom; Warning! If this bulb is used as a turn signal by your vehicle, its possible it can cause fast flashing; Solution is installation of 50W resistor 18 x 5050 SMD LED Per Bulb ; Depending on housing used in, will be more dim than standard bulbs; Did you know Red LED behind Red lens gives best output; Do not install white LED behind Red lens 1157 = 1154 2057 2357 2397 3497 1016 1034 7528 Pack of 2; Maybe less bright than factory bulbs; Will not work out in all applications