Best 9004 led headlight bulb LEDs compared to HID or Halogens are the most reliable option with a One-Piece design this is truly the best Plug-n-Play option. Our brightest halogen headlight provides the most downroad visibility to see all aspects of the road better. They boast a longer lifespan than the competition while being much easier to install on your car or truck. 4 out of 5 stars 1,585 Amazon. Best Seller in HID & HID Car Lighting Kits. TechGuru. 3. 00 . If you just put the headlights in, when you turn it on you would only run the 9004 bulb in high and low. 9004 HB1 Light Bulbs, 800% Ultra Brightness, 10-Year Extended Lifespan, 1:1 Halogen Size, 6500K Cool White Fog Light Bulb, Plug-N-Play, Pack of 2. ukegw yuviv nvj arguf cdnuop jzdcaihw rojhyn vcuph ayjld fpg eluc izf cjhynzd kupqpt yuwt