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H4 9003 LED Bulb
What are the upgrades of ROYLUX 1:1 Mini Size H4 led fog light bulbs?
- True 1:1 design: Compared to other H4 bulbs on the market, the H4 fog light bulb has no bulky base and extra driver, and the halogen bulb 1:1 size design, so you can easily install it into the lamp housing, no need to spend a lot of time to adjust repeatedly, 100% no installation problems, to achieve a 5-minute installation.
- 400% Brighter Than Halogen: ROYLUX H4 LED, with 16 upgraded CSP chips, provides 16000LM, and 400% comfortable brightness without blinding oncoming traffic. At the same time, the extremely thin 0.03-inch led interval makes the field of view wider, with no dark spots, to ensure your safe driving.
- Excellent cooling system: Compared to other H4 products on the market, mini-size H4 bulbs often do not have cooling fans, which can greatly reduce the life of the bulb. ROYLUX H4 uses the latest upgraded silent turbofan, smaller than ordinary fans, but can reach the same 12,000 rpm to ensure efficient heat dissipation without annoying noise, making the journey more enjoyable.
- True plug-and-play: The whole body is made of space aluminum, which is more robust and durable and has better heat dissipation performance. Compared to other H4 bulbs on the market with plastic plugs, ROYLUX H4 led bulbs will not have the problem of the plug falling off and being damaged, nor the danger of overheating and melting.
ROYLUX H4 fog light bulb high low beam perfectly mimic the original halogen beam pattern, You can get a more perfectly focused cut off line and beam pattern. No shadow areas or dark spots, no glare or dazzle to oncoming traffic, ensure a safer drive.
Product Performance
CANBUS Canceller IC Built-in
Canbus apply to more than 99% vehicles,this helps to eliminate dashboard error messages and make bulb flickering free . Please note that some cars may require an additional CAN Bus decoder to be installed.
Mini Silent Turbofan
2023 new upgraded silent turbofan, smaller size, can effectively reduce annoying noise, but also can reach 12,000 rpm efficient cooling so that the chip can run for a long time.
True 1:1 design
Compared to other H4 bulbs on the market, the upgraded H4 fog light bulb has no bulky base and extra driver, and the halogen bulb 1:1 size design, so you can easily install it into the lamp housing.
Greatly Improved Vision
Compare to other H4 bulbs, ROYLUX H4 led bulbs narrowed the led interval to only 0.03in, making the bulbs 360-degree lighting like OEM bulbs. No shadows, no dark spots.
16-Core Customized
ROYLUX H4 led headlight bulb high and low has 16-core customized Top Automotive Grade CSP LED Chips, array chips design ensure uniform light without any dark spot, provide wider viewing angle.
Without Blinding Design
ROYLUX H4 with 16 upgraded CSP chips, provides 16000LM, and 400% comfortable brightness without blinding oncoming traffic.
With excellent IP68-rated performance, the H4 led light bulb can work normally and help you see in bad weather.
- ROYLUX LED BULBS SERIES
Amanda Nuno
2025-09-01 15:31:09
great product! it upgraded my wifes car from the stock lights. These lights are made very well and perform great i would highly recommend
CJM
2025-08-29 13:32:13
These were pretty easy to install in the headlight housings of my 02 Civic. Just line up the tabs on these H4 led bulbs to match the bulb socket in the headlight housings and secure with bulb retainer. Nice and bright on both low and high beams. They appear to be well built and only time will tell how long they will last.
Andrew
2025-08-18 12:22:20
Works perfectly
Scott
2025-07-26 10:20:05
Very bright, perfect fitment, highly recommend
Deke
2025-02-25 12:39:03
Installed these in 99 Taco.Super easy plug and play ,they even provided a laboratory grade glove to aid in not getting hand oils on the bulb,lessening its life.
thomas
2025-01-14 13:59:42
see better night
Terry Wright
2024-12-18 12:33:02
Amazing brightness, great on my Tacoma.
Michael
2024-12-07 13:26:03
So, headlight burnt out and was looking at replacements. This product had great reviews so primed a set for my 2014 Taco. Installed in less than 20 minutes with no issues. There are plenty of how to videos on YouTube.WOW! What a difference! The distance I can see is with the low beam LED’s, is close to the high beam distance of the halogens I replaced. I also did the fog lights in led. My wife drove my truck once and asked to put them in her Highlander. Take the plunge, you will not be sorry.
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