Previously, Lasfit introduced the brand new led brake tail lights through two detailed articles — one exploring its development journey and another highlighting its innovative features. As the next-generation upgrade to the T3 Series red tail brake lights, the D Series represents a major leap forward in both performance and reliability.
But what exactly are the differences and similarities between these two series?
In this blog, we’ll break down the key improvements and shared qualities of the Lasfit D Series compared to the T3 Series in red brake/tail lights, giving you a clear understanding of how the D Series raises the bar for LED tail and brake light upgrades.
How do the D Series and T3 Series red taillights/brake lights differ?
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Smarter Canbus Decoding for Fewer Errors
The D Series is equipped with a consistent 24W power output per bulb, which closely matches that of halogen bulbs. This design helps eliminate dashboard warning lights, error codes, and hyper flash issues caused by mismatched power levels — especially in vehicles with sensitive onboard systems. Compared to the T3 Series, the D Series offers more stable and efficient decoding, ensuring reliable performance across a wider range of vehicles.
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Dual-Beam Chip Design for Better Function Separation
Unlike the single-layer chip design of the T3 Series, the D Series features a dual-LED chip structure that allows it to clearly differentiate between tail light and brake light modes. When you brake, the brightness increases significantly, offering a clear visual cue to drivers behind you — an important upgrade for driving safety.
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Optimized Light Distribution with Top-Mounted LEDs and Lens
The D Series uses a top-mounted LED layout instead of the four-sided chip setup found in the T3 Series. It also includes an integrated optical lens to enhance light diffusion, producing a more even and brilliant red glow that fills the entire tail light housing for 360° visibility.
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Built-In Cooling Fan for Better Heat Dissipation
The D Series includes a miniature cooling fan that helps efficiently dissipate heat, extending the LED lifespan and maintaining optimal brightness. This is a significant upgrade over the fanless T3 design, especially for drivers who frequently brake in heavy traffic or long downhill stretches.
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Non-Polarity Design for Hassle-Free Installation
Both positive and negative terminals are accepted in the D Series thanks to its non-polarity circuit design. That means you can plug it in either way without worrying about orientation — making installation quick, easy, and mistake-proof. No more worried about the CK or non-CK socket, just plug and play.
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|---|---|---|
| Color | Red | Red |
| Wattage/Bulb | 24W | 21W |
| Lumens | 2400LM | 2000LM |
| LED Chips Design | Dual LED Chips Design | Single LED Chips Design |
| LED Chips Material | 8 x 3575 LED Chips 3 x 1860 LED Chips |
20 x 3030 LED Chips |
| Can-Bus Ready | Yes | Yes |
| Built-in Fin | Yes | No |
| Non-polarity Design | Yes | No |
What do the D Series and T3 Series red tail lights/brake lights have in common?
- Buy with Confidence: Both series are backed by Lasfit’s 45-day free return policy and 1-year hassle-free warranty.
- Multiple Socket Options: Available in all major sizes: 7443 brake bulbs, 4257 brake bulbs, 3157 brake bulbs, 1156 brake bulbs, 1157 brake bulbs.
- Value-Packed Pricing: Despite major upgrades, the D Series remains affordably priced at $59.99 (originally $69.99).
- Compact Design for Easy Fit: Small size ensures plug-and-play installation. You can refer to our turn signal & tail light install guide for help.
- IP67 Waterproof Rating: Both are built to withstand rain, moisture, and harsh road conditions.
Conclusion
While the T3 Series led tail light bulbs served as a reliable upgrade in the past, it has now been officially discontinued. The D Series not only inherits the strengths of its predecessor but also brings significant upgrades in performance, safety, and user experience.
If you're ready to replace your factory halogen brake lights or upgrade from the old led lights, the Lasfit D Series is the smarter, brighter, and longer-lasting solution.