What Are the Types of Car Bulbs?
4 Answers
Car bulb models are mainly divided into H-class and D-class, which can be distinguished by the number of lamp pins and tabs. Common models include H1, H3, H4, H7, H11, etc. Here is the relevant information: 1. Timely bulb replacement: As car lights are used, the brightness of the bulbs will gradually decrease. This normal physical phenomenon is called light decay. Dim car lights can easily cause accidents, so once the lights dim, they should be replaced promptly and not wait until they fail. Choosing high-quality bulbs can delay color decay, extend service life, and provide more safety for driving. It is recommended to replace bulbs in pairs every 20,000 kilometers. 2. Bulb selection: If the color temperature exceeds 6000K, the light penetration decreases, which is not conducive to driving in rainy or foggy weather. Therefore, car bulbs with safe and effective color temperatures should be selected.
There are indeed many types of car bulbs, and I've encountered numerous varieties while servicing different vehicles. For headlights, H4 and H7 are commonly used. The H4 has a dual-filament design, suitable for older models, integrating both high and low beams; whereas the H7 is single-filament and mostly found in newer cars. For taillights, the 1157 model is quite popular, featuring two contacts corresponding to brake and parking lights respectively. Turn signals often use 3156 or 3157, where the numbers indicate the bulb base shape—alignment is crucial during installation. Fog lights might utilize H3 or the 880 series, with different colors affecting light penetration. Small bulbs like license plate lights are typically model 194 or 168, which are relatively compact. Nowadays, LED bulbs are gaining popularity, such as H11 LED or 9006 LED, offering higher brightness but requiring attention to local regulations for modifications to avoid legal issues. When selecting bulbs, always refer to the vehicle manual or measure the socket size to prevent mismatches that could lead to short circuits or blown fuses. I recommend regular checks on bulb conditions, especially during rainy seasons when frequent usage can accelerate filament wear.
I love DIY car light replacement, but the variety of bulb models is like a maze. H4 is the most common in headlights, used in many older cars; newer ones like H7 or H11 are also good. Brake lights often use 1157, which is a dual-function bulb—one filament for brakes and the other for taillights. Turn signals commonly use 3157 or 3156, where the pin shape is crucial. Small bulbs like W5W are used for interior reading lights, a simplified version of the 195 model. When DIYing, checking your car’s manual is the most reliable, and auto parts store apps can scan for matches. Don’t skimp on bulbs—brands like Osram or Philips last longer. LED bulbs, including H4 versions, are brighter and more energy-efficient, but heat dissipation is key, as excessive power can interfere with circuits. Wear gloves to avoid stains when replacing bulbs, and don’t touch the glass—oil residue can cause premature burnout. Choosing the wrong model not only prevents the light from working but may also cause electrical faults. Safety first.
Having driven for decades, changing bulbs is routine, and their models are as familiar as old friends. The H4 headlight bulb is the most common, with thin filaments prone to breaking, especially on bumpy roads. The 1157 brake light bulb is widely used, lighting up both filaments when the switch is engaged. For turn signals, the 3157 series is standard—just ensure the pin configuration matches; don’t swap randomly. Fog lights typically use H3 or 880 bulbs, with yellow light performing best in foggy conditions. Sticking to OEM models ensures reliability, adequate brightness without glare. Bulb lifespan averages around 500 hours; frequent burnout suggests voltage issues. Avoid arbitrarily switching to higher-wattage bulbs to prevent overloading and blowing fuses. For safety, replace dim bulbs promptly to ensure peace of mind when driving at night.
