【400% Brighter than Halogen】Auxbeam 921 LED bulb is built with 7 PCS high brightness 3030-SMD chips and 18 PCS stable 4014-SMD chips. 5.5W per bulb, only 1/4 energy consumption of original halogen bulbs but 4 times brighter, providing stylish and clean 6500K white light. 0.1s instant-on without warm-up time.

【Unique Dual HD Lens】Designed with 2023 latest tech for best beam assistance - dual HD glass lens concentrating structure for stronger light penetration, which provides 80% more visibility than ordinary leds. Auxbeam 912 led bulb also supports 360°lighting without dark spot.

【5 Minutes Quick Installation】Resembling original halogen bulb size design, no polarity setting, no modification required, just Plug and Play. Compatible for 99% vehicles. Matching great in the assembly. Fit socket T15, 912, 921, 922, 906, 904, 902, W16W, 916, 916LL, 916NA, etc.

【Perfect Performance】IP68 waterproof. The built-in Elecsy- X IC driver avoids digital or VHF radio signal interference, stably controlling voltage and heat. The aviation grade aluminum lamp body with surround heat grooves ensures fast cooling, efficiently prolonging lifespan of t15 bulbs up to 50,000 hours to avoid frequent bulb replacements.

【Notice】Most cars require led resistors to avoid hyper flash, malfunction or trigger warning message on dashboard when switching from halogen bulbs to led. If it is the first time you try led bulbs on 921 backup reverse lights, the 50w 6ohm load resistors (NOT included) may be needed. Message AUXBEAM if you need any help as we are 24/7 ready to serve you.