Nowadays many modern vehicles come with built-in LED headlights modules or projector lens. They look clean, energy efficient and maintenance-free, but when it comes to real on-road illumination, manufacturer OEM LED modules or projector lens often fall week.
Original LED Systems Prioritize National Standards, Stability and Lifespan, Not Brightness
OEM LED modules or projectors are designed to meet the National Standards, such as Chinese GB+4599-2024, European E-Mark-R112, American DOT-FMVSS108, etc., meanwhile minimize the defective rates. There is always a maximum or/and minumum LUX limit for many tested spots or areas in every national headlight standards’ regulations, that’s why the automakers can not enhance the lighting output as high as they could acheive.
In contrast, without the National Standards’ Limit, our aftermarket aimed BiLED square projector lens AD21A adpots high lighting efficiency LED module chips 3570 and 3535, runs high power output at 52W/low beam and 57W/high beam, 3400 lumen/stable lighting output with a precise cutoff line and outstanding lighting performance.
AD21A Low Beam Clarity, From Dim to Defined
When installed on the BYD Dolphin, the AD21A LED projector lens produces an impressive brightness both in low beam and high beam. The low beam delivers a sharp cutoff line which fully illuminates the driver’s lane, even on wet or dark surfaces. The transition from bright to shadow is smooth, ensuring visibility without harsh contrasts.
AD21A High Beam Distance, Focused Power
The beam penetrates deep into the distance, exposing every detail on the road, markings and signs. You’ll notice earlier visibility of obstacles, reflectors and turns, which translates directly into safer and more confident night driving.
AD21A Real Upgrade You Can See
Meanwhile, the AD21A LED projector lens is a square shape lens, same shape as the original lens, ensuring a good fit with the original vehicle’s headlight frame. The high beam upper portion and low beam bottom portion will not be obstructed by the headlight’s frame.
After modification, the improvement is not just visible, it’s felt.
·The low beam eliminates dark spots and extends the visible area.
·The high beam reaches farther and lights up roadside details.
This isn’t just a lighting upgrade, it’s a total driving confidence boost at night.
About the OEM headlight lens cooling fan:
Recently, industry feedback shows that some Chinese new energy vehicles, such as some models of Geely and GWM(Great Wall Motor), have already adopted high quality cooling fans for their headlight projector cooling systems.
This contrasts with some sayings, in certain countries in certain times, national regulations restrict the use of active-fan for cooling in OEM headlamps, we supposed probably due to the fans’ stability and defective rate.
Seems today the situation appears more flexible, the fan-assisted heat dissipation solutions is truly helpful for higher lumen output and compact optical modules structure design. However, official national guidelines still setup many limits for the lighting patterns. If you have updated insights on the regulatory stance regarding cooling fan usage in China or abroad, PLEASE share your knowledge with us.
Our Commitment
The BTLP-AD21A BiLED projector lens combines high grade reliability with aftermarket level brightness. You get the high durability of LED technology, furthermore with the focused power and beam quality that makes the night driving truly safe and comfortable.
Thanks for reading, if you have any question about LED spot auxiliary lights, LED projector lens, LED headlight bulb and LED signal lights, please feel free to contact us.
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Post time: Dec-03-2025