What is the difference between h4 and l4?
2 Answers
H4 stands for High-speed 4WD, while L4 stands for Low-speed 4WD. Both are terms used for four-wheel-drive systems, with the main difference being high-speed and low-speed modes. Different four-wheel-drive modes should be used according to different environments to help the vehicle achieve better driving performance. Below are the distinctions between the two: 1. High-speed 4WD is suitable for driving on gravel roads, muddy surfaces, snow, and sandy terrain, with the maximum speed generally limited to 80KM/h. 2. Low-speed 4WD provides higher torque, making it more powerful and suitable for off-roading, climbing steep slopes, descending steep inclines, and escaping difficult situations. It is rarely used for continuous driving. Note: When using 4L, it is best to start in 1st gear and avoid shifting to gears higher than 2nd. Additionally, the speed should not be too high. Use L4 when driving slowly and H4 when driving faster. For everyday driving without off-roading, use the automatic mode.
To be honest, I've had personal experience with the difference between H4 and L4 bulbs. The H4 bulb is the dual-filament type used in my car, which handles both high and low beam functions - just press the switch to toggle at night. L4 bulbs might only support low-beam illumination, commonly found in some older or budget vehicles but rarely seen in modern cars. The key difference is that H4 offers more flexibility with wider light coverage, while L4 is limited to single-mode operation which often proves insufficient. When replacing bulbs, be cautious: substituting L4 for original H4 may result in inadequate lighting, while the reverse could cause circuit damage due to voltage mismatch. It's best to consult your vehicle manual or visit a professional shop to avoid wasting money. During routine maintenance, I regularly clean dust off the lens covers to maintain clear beam projection - this is crucial for driving safety, especially on dark road sections.
