LED Headlight Bulbs by Size — H11, 9005, 9006, H7, H4 & More

Frequently asked questions

• What LED headlight bulb size does my car use?

  The fastest way is the Vehicle Finder on any product page: enter your Year, Make and Model and it returns your exact low-beam and high-beam sizes. You can also check the owner's manual, or remove the stock bulb and read the marking on its base (for example H11 or 9005).

• What is the difference between H11 and 9005 bulbs?

  H11 and 9005 have different base designs and are not interchangeable. H11 is most commonly the low-beam bulb on modern cars and SUVs, while 9005 (HB3) is typically the high beam. If your vehicle uses one of each, the 9005+H11 combo pack covers both beams with matching 25,000LM output.

• Are H11, H9 and H8 bulbs interchangeable?

  Yes — H11, H9, H8 and H16JP share the same base family, and the GX H11 model is built to cover all four — one bulb fits sockets marked H11, H9, H8 or H16JP. Always confirm your current bulb's marking or run the Vehicle Finder before ordering.

• Can I use a 9005 bulb in place of a 9006?

  No — 9005 (HB3) and 9006 (HB4) have different locking tabs and wiring, so they cannot be swapped. 9005 is generally the high beam and 9006 the low beam. Order each size separately or choose the 9005+9006 combo pack for a matched high/low beam upgrade.

• What vehicles use H4 (9003) headlight bulbs?

  H4 (9003) is a dual-beam socket — one bulb produces both high and low beam — common on motorcycles, Jeep models and many older cars and trucks. The GX H4 bulb delivers 25,000LM with a clean beam cutoff in both modes.

• How bright are Auxbeam GX Series LED headlight bulbs?

  Every bulb in this collection is the GX Series: 25,000LM and 120W per pair in 6500K cool white — roughly 3–4 times the output of a standard halogen bulb. Need even more? The GX-ULTRA reaches 40,000LM in our LED light bulbs by series collection.

• My car uses H7 or 9012 bulbs — are they covered?

  Yes. The GX platform covers H7 for European vehicles and 9012/HIR2 for newer Chrysler, Ram and VW models, plus H13/9008, 9007/HB5 and 9004/HB1 for older cars and trucks — all at the same 25,000LM / 120W output.

• Should I replace only the low beam, or both high and low beams?

  For consistent light color and output, replace both beams at the same time — mixing halogen and LED between high and low beams looks uneven. The 9005+H11, 9005+9006 and H11+H11 combo packs include all four bulbs at a bundle discount.

• Are these LED bulbs hard to install?

  No — GX Series bulbs are plug-and-play: remove the stock bulb, insert the LED and connect the plug, usually 10–15 minutes per side. If your headlight dust cover is tight, check the product page for the bulb's dimensions, or see our headlight installation guide for H4, H7 and H13 socket tips.

• What warranty do Auxbeam LED headlight bulbs include?

  All bulbs in this collection come with a 2-year warranty, 30-day easy returns, and free US shipping on orders over $19.90. For claims, contact customer@auxbeam.com with your order number.