Alla Lighting Super Bright 912 921 LED Backup Light Bulb W16W 912 921 LED Bulb 6000K Xenon White High Power 3014 36-SMD T15 Wedge LED 921 Bulb Back Up Reverse Light Bulbs Lamps (Set of 2) (Set of 2) Color: 6000K xenon white. Warranty: Fully " ONE YEAR " guaranteed. LED Type: 36 pieces high power & high quality 3014 SMD led chips per 921 LED bulb. Size: 0.47" in diameter, and 1.76" in length.360 full view angle. No UV or IR radiation,working voltage: 12V~18V. Cross Reference Number: 906, 579, 901, 904, 908, 909, 912, 914, 915, 916, 917, 918, 920, 921, 922, 923, 926, 927, 928, 939, W16W, T15, 921K, 921KX, 921LL, 912K, 912KX,etc Use for replacing stock halogen or incandescent 921 back up reversing light applications; ONE YEAR warranty guaranteed. For most vehicles, just plug and play, easy installation. Yet for some European vehicles,extra load resistors maybe required to avoid the flickering or error code.