2Pcs Strobe P21W BA15S 1156 BAY15D 1157 P21W 33 Smd led 5630 5730 Car Brake Bulbs Lights Reverse Daytime Lamps White Red Yellow IF You Have Any Problems About Our Products,Please Connect With Us Before You Give a Feedback,We Will Give You A Satisfied Solution!! Very important: please make sure the socket Type for your car. The principle of Brake Light : BAY15D Bulb:open a small light(Clearance Light),micro bright,when brakes,all bright. BA15S Bulb:open,all bright. BAY15D With Strobe Bulb:open a small light(Clearance Light),all bright,when brakes,the light will flash like the strobe function show.If not open a small light,when brakes,the light will flash like the strobe function show. BA15S With Strobe Bulb:When opens,the light will flash like the strobe function show. Strobe Function Show: Features : Light beads:33 SMD 5630 high bright LED Package Included: 2 x 1156 or 1157 33SMD High Power LED Bulb |