Jtech 2x T25 3157. 13W High Power LED White Signal Light Bulb - Direct replacement for all Wedge Type T25, 3056 3356 3456 4156 3057 3155 3156 3357 3457 4157 etc base - Input : 12V, Low power cosumption, Constant Current design, when voltage changes, current changes. No UV or IR radiation - Base : T25 3157, 360 emitting degree - Superior Quality Product engineered and manufactured by Latest technology Glow 7W Cree LED in the front projector lens , 4x 1.5W Epistar LED sides and each side has one large high brightness LED plate - This bulb has a conventional type pin configuration. For the SRCK type socket, flip(reverse) the pin as shown on the photo #6