What Does the Headlight Model Comparison Table Include?
2 Answers
Headlight model comparison table is as follows: 1. H1, H7: H1 has one pin, mostly used for high beam; H7 has two pins with one tab on the edge, mostly used for low beam, commonly found in European cars for both high and low beams. 2. H3, H11: Mostly used for fog lights. 3. H4: H4 is a dual-beam bulb with three pins and three tabs on the edge, generally used in Japanese and Korean cars. 4. Turn signal bulbs: such as PY21W; position lights are mostly W5W, H9, H10, H11, H12, etc.; rear lights commonly use P21W, P21/5W, and other bulb models. 5. D stands for xenon lamp: common xenon lamp models include D1S, D2S, D3S, D1R, D2R, etc., odd numbers indicate with starter, even numbers without starter; 2 indicates mercury-containing, 3 and 4 are mercury-free, S stands for use with lens, R is for reflector bowl.
As an enthusiast who frequently dabbles in headlight modifications, the headlight model compatibility chart is practically my bible. It primarily lists different headlight categories such as halogen, LED, or HID, with specific model codes under each category. For instance, H4 is a common dual-filament bulb suitable for vehicles that switch between low and high beams, while 9005 is a high-output type often used in premium SUVs. The chart also meticulously notes compatible vehicle models—like Toyota Corolla using H7 bulbs or Honda Civic recommending 9006—along with power ratings ranging from 55 watts to 100 watts. It even includes bulb dimensions and compatibility tips, such as some LED bulbs requiring additional decoders to work with older vehicle electrical systems. When shopping online or at auto parts stores, I always consult the chart first to avoid wasting money on mismatched products. Once, I swapped in a compatible LED bulb directly, which significantly improved illumination, making nighttime driving safer and brighter. I keep a few online compatibility chart websites bookmarked—just enter the license plate or model year to pull up data instantly, super convenient.
