What are the differences between halogen headlights and LED headlights?
2 Answers
Here are the specific differences between halogen headlights and LED headlights: 1. Light emission principle: Halogen lamps use tungsten filaments to emit light, while LED headlights use light-emitting diodes. 2. Energy consumption: Halogen lamps consume the most energy, typically 55W in vehicles, whereas LED headlights consume around 20W. 3. Brightness: Halogen lamps are less bright, with 55W producing over 1000 lumens, while current LED headlights with 20W can achieve 3000-4000 lumens. 4. Lifespan: The typical lifespan of a halogen lamp is 500 hours, while the lifespan of LED headlights is currently hard to determine due to immature technology, but theoretically it can reach around 50,000 hours.
Over the past decade, I've driven cars with various types of lights. Halogen lights are like old-fashioned household bulbs—they light up slowly and emit a yellowish glow, but they have exceptional penetration in rainy or foggy conditions. LED lights reach full brightness instantly upon startup, with white illumination that makes road signs reflect clearly, though they can be glaring in heavy fog. Last year when I was driving on mountain roads, after upgrading from factory halogen to LED lights, the low beams illuminated half a lane wider, but the high beams caused tree shadows to suddenly appear, requiring readjustment to judge distances. Halogen lights cost just 20 yuan to replace a bulb, while a broken LED requires replacing the entire assembly, which can cost over a thousand yuan—truly painful. A reminder: directly swapping bulbs for LEDs without changing the lens is considered illegal modification if caught by traffic police.
