H11 led bulbs 1. Wireless Direct Insertion Design - No bulky Led driver and additional harness,whole LED can be put into existing housing,100% direct connection,starting in zero second. 2. Custom ZES Lamp Beads - The brightness is 4 times brighter than original halogen lamp,and it is more concentrated,wider and farther,no dark area. 3. Stronger Cooling - adopted Japan imported aluminum to create a seamless body,together with 9-leaf fan design,no heat leakage,high-speed heat conduction. 4. Precision Temperature Control - With intelligent temperature control,it can effectively self adjust the temperature,make the product more durable,and the service life last up to 30,000 hours. 5. Plus,please ensure the inner diameter of reflector's mounting hole is lager than 1.45"(3.7CM) before purchasing H11 led .