(Set of 2) Each 912 LED bulb is about 1000 lumens, total 2000 lumens for both LED 921 bulbs. LED Type: 30 pieces high power & high illumination 3020 SMD led chips per 912 LED bulbs. | Size: 0.55" in width, and 1.65" 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, 912LL, 194, etc | Use for replacing stock halogen/incandescent dim W16W 912 921 backup reversing light, trunk cargo lights, 3rd brake lights(center high-mounted stop light) lamp; Color: 6000K xenon white. Warranty: Fully " ONE YEAR " guaranteed. | For most vehicles just directly plug and play, easy installation, yet for some vehicles, load resistors maybe required to avoid the error code or blinking.