The debate between halogen and LED headlights has never really stopped. Some swear by halogens for their unique penetrating ability in rainy or foggy weather – like a martial arts master who can still see through the mist. Meanwhile, many premium cars are switching to LEDs – does that mean LEDs are the true “bright‑eye wonder”? To find out, we took a Geely Emgrand (around 90,000 CNY on the road) out on a drizzly night – not a downpour, but wet enough to test any headlight – and challenged it on both highways and narrow country lanes to see how the factory halogens really performed.
On the highway: halogen high beams fall short
We started with the high beams on the motorway. The coverage was acceptable, but the usable distance was limited – unless you have eagle‑like vision, small obstacles ahead are easy to miss. It’s like looking for a needle in the dark – without the sharp, broad field that LEDs provide, halogens clearly struggle.
On country roads: halogens surprise
Then we moved to unlit, winding country lanes. Contrary to what some online opinions suggest, the halogens didn’t “fade into obscurity.” They’re certainly limited when it comes to picking out pedestrians or small objects – but they have one unexpected trick: on wet roads, halogen light reflects off puddles and potholes like a spotlight, making them surprisingly easy to spot. That’s one area where LEDs can’t yet match them.
The takeaway: it’s not about type – it’s about colour temperature and aim
Halogens aren’t useless – they have unique strengths in specific situations. The real difference comes down to colour temperature and factory aim. Think of it like cooking: ingredients matter, but it’s the heat and timing that really decide the dish. So think twice before swapping your headlights – don’t rush into a change.
In the end, halogen and LED are like two different martial artists. Halogen is the seasoned elder – adaptable, with a subtle insight into tricky road conditions. LED is the younger, sharper contender – bright, efficient, and powerful. Which is better? There’s no single answer – it depends on your driving environment and what you prioritise.
Technical supplement: how bi‑LED (LED projector) headlights work
A bi‑LED headlight isn’t just two light sources squeezed into one housing. The core is the optical design – a precision reflector, a shield plate, and a lens work together so that the same set of LED chips produces different beam patterns under different drive currents: at full current, all light is emitted for a powerful high beam; at reduced current, the internal shielding mechanism automatically cuts the upper portion of the beam to avoid glare, creating a compliant low beam. This “single source, dual mode” technology is more compact, faster‑responding, and more efficient than traditional separate halogen high‑beam/low‑beam setups, with a lifespan typically exceeding 30,000 hours. National safety regulations require that low beams do not cause glare for oncoming drivers – and properly designed bi‑LED systems meet this standard through dynamic beam‑shaping.
Real‑world experience: upgrading the Chery eQ1 (Xiaoyi) to bi‑LED
Anyone who’s driven an older eQ1 knows the factory halogens make night driving feel like peering through a thin fog – kerbs vanish in narrow alleys, and rain makes reflections even worse. After swapping to a set of bi‑LED bulbs designed for the 2017–2022 eQ1, the beam tightens up, the cut‑off sharpens, and the spread widens – road texture is clearly visible within 30 metres on low beam, and the high beam easily reaches signs 80 metres away, with no scatter and no dark patches. Installation is a simple plug‑and‑play swap using the original H4 connector – no cutting, no extra wiring. The lamp body has a smart temperature‑controlled fan that keeps heat in check even on long drives. The beam is also designed with anti‑glare optimisation – the cut‑off is smooth and won’t make oncoming cyclists or drivers frown. When you head home at night, that moment the lights come on gives you a real sense of confidence and security.