H11/H9/H8 Switchback LED Fog Light Bulbs – 110W 25000LM GX Bi-Color Series, 6500K/3000K Dual Color

Frequently asked questions

• Will these H11 LED bulbs fit my fog lights?

  
  These bulbs fit any vehicle whose fog lights or low beams use an H11, H9, H8, or H16JP socket. To confirm your socket type in seconds, open the Select Your Vehicle tool and enter your year, make, and model, or message us at customer@auxbeam.com with your vehicle details and we will check fitment for you before you order.
  

• How do I switch between the white and yellow light?

  Turn your fog light (or headlight) switch off, then on again—this simple ON-OFF-ON toggle changes the bulbs from 6500K cool white to 3000K golden yellow. No extra wiring or controller is needed. Keep in mind the bulbs have no memory function: every time you start the car they light up in white by default, and one more toggle brings back the yellow mode whenever conditions change. The full switch is demonstrated in our official product video.

• When should I use the yellow light instead of white?

  
  Use 3000K golden yellow in fog, heavy rain, or snow: the longer wavelength reduces glare and reflection from water droplets and snowflakes, so the beam penetrates further and your eyes strain less. Use 6500K cool white for clear-night driving, where it delivers maximum clarity and a wide illumination range. Many drivers run white as their default and switch to yellow only when the weather turns—exactly why the two colors share one bulb.
  

• Are these fog light bulbs or low beam headlight bulbs?

  
  They work for both. H11/H8/H9 sockets are commonly used for fog lights or low beams, and the 360° beam pattern with precise cut-off keeps the light where it belongs in either position. If your vehicle uses H11 for both fog lights and low beams, you can run one set in each location; for high beam sockets such as 9005, see the LED headlight bulbs collection to pick the matching pair.
  

• Are H16JP, H9, and H8 really compatible with the same bulb?

  
  Yes—H11, H9, H8, and H16JP share the same H-series base and latch design, so one bulb physically fits all four. Electrical differences (H9/H8 draw and polarity) are handled by the built-in driver, which is polarity-free and rated for the 9-13V operating range. Just confirm your owner’s manual lists one of these sockets, and the same pair will drop in without adapters or cutting.
  

• The original dust cover will not close after installation. What should I do?

  
  This is expected on some housings: the LED bulb’s cooling fan occupies more space than the halogen bulb did, so the rigid original dust cover may not fit back. The fix is simple—replace it with a flexible silicone dust cover, which seals the housing while leaving room for the fan. You can order one from the dust cover collection; installation takes less than a minute.
  

• My fog lights flicker or show an error code after installation. How do I fix it?

  
  The built-in driver is compatible with 99% of vehicle computer systems, but a few sensitive brands—Mercedes-Benz, BMW, Volvo, Dodge, Ford Fusion/Focus/Escape—may flicker or throw a bulb-out warning. This is not a quality issue; adding a decoder resistor solves it. Based on our order records, C10 covers most vehicles including Ford, Jeep, and GMC; RAM, Mercedes-Benz, and BMW should take C20 directly; Dodge owners can start with C10 and switch to C20 if needed. Both models are offered as add-on options on this page, or separately in the Canbus decoder collection.
  

• What is the difference between this page and the GX Bi-Color headlight page?

  
  Both belong to the Auxbeam GX Bi-Color Series with the same 110W/25,000LM output and 6500K/3000K switching. This page is the H11/H9/H8/H16JP single-socket version, aimed at fog lights and low beams. The GX Bi-Color LED headlight bulbs page carries seven socket options (H11/H9/H8, 9005, 9006, 9012, H7, H4, H1) for full headlight setups. Pick this page if you only need fog or low beams in H-family sockets; visit the other page for high beam sockets or mixed setups.
  

• How long does installation take?

  
  Most drivers finish both sides in 15-20 minutes. The bulbs are a 1:1 mini match to the halogen size, polarity-free, and truly plug-and-play: twist out the old bulb, connect the plug to the external driver, and seat the new bulb—no cutting, no drilling. If your housing needs a silicone dust cover afterward, plan a few extra minutes.
  

• How long do these bulbs last, and are they waterproof?

  
  The dual heat pipe design and 12,000RPM fan in a 6063 aluminum body keep operating temperatures low, for a lifespan of over 50,000 hours. The bulbs are rated IP68 waterproof and work from -45℃ to 150℃, so rain, snow, and car washes are no problem. They are covered by Auxbeam’s 2-year warranty with 30-day returns; if anything goes wrong, contact customer@auxbeam.com or check the LED bulbs FAQ hub.