Morimoto Elite HID System: Range Rover Evoque Install Guide
Upgrading the halogen projector headlights on a modern SUV is one of the most satisfying lighting jobs we do here at the shop, and today we tackled a brand new Range Rover Evoque with the Morimoto Elite HID System. This kit takes a factory halogen projector and gives it a clean, pure white output without […]
LED Halos and Strips: The Complete Guide to Switchback and RGB
If you want to take your custom headlight build to the next level, LED halos and strips are the way to do it. Whether you are after a clean switchback daytime running light or a full color-changing RGB setup, the options from Profile Performance are in a class of their own. Here at The […]
Best Bi-LED Projectors for Retrofitting: Head-to-Head Comparison
When it comes to upgrading your headlights, choosing the right bi-LED projector for retrofitting can feel overwhelming. The market has exploded with options over the past few years, and not all of them deliver on their promises. We got our hands on every major LED projector available, mounted them side by side on a beam […]
What’s Better: HID or LED D2S Bulbs? (2026 Comparison Guide)
When comparing HID vs LED D2S bulbs, the answer is not as straightforward as most people think. If your vehicle uses D2S HID headlights, you have probably asked yourself whether it is worth upgrading to LED replacements. On paper, LED sounds like the obvious winner. Newer technology, higher efficiency, and bold claims about brightness. But […]
Best LED Headlight Bulbs: Performance, Optics, and Real-World Results (2026 Guide)
LED headlight bulbs have become one of the most common upgrades in modern automotive lighting. They promise increased brightness, improved efficiency, and a cleaner, whiter light output compared to traditional halogen systems. However, upgrading to LED is not as simple as swapping one bulb for another. From an engineering standpoint, LED headlight retrofits introduce a […]
Why LED Headlight Bulbs Don’t Work in Some Cars: Optical Design, Geometry, and System Limitations
LED headlight bulbs are widely marketed as a direct upgrade for halogen and HID systems. However, there are reasons why LED headlight bulbs don’t work in some cars, even if they often match the physical dimensions required for installation; they do not always integrate properly with the optical design of the headlight. This mismatch between […]
Headlight Experts at The Retrofit Source
As the headlight experts behind The Retrofit Source, Tyler Jordan and Caleb Morgan bring over a decade of hands-on automotive lighting experience to every article on this blog. TRS was built by enthusiasts who got tired of settling for stock lighting. Since 2005, it has grown from a small operation into the largest general distributor […]
Laser vs HID vs LED Headlight Projectors for Retrofits: Which Is Best?
Choosing the right headlight projector for your retrofit can feel overwhelming. With bi-xenon HID projectors, bi-LED projectors, and even laser-assist options on the market, understanding the differences between these technologies is critical before you commit to a build. In this comprehensive guide, we break down every major projector type available for headlight retrofits, compare their […]
Why Projector Retrofits?
Hey there, fellow headlight enthusiasts! You’ve probably seen the magic of plug-and-play LED bulbs and HID kits. But have you ever dived into the world of projector retrofits? If not, buckle up! We’re about to take you on a journey that will illuminate the path to your next headlight upgrade. Why Projector Retrofits? So, why […]
A Perfect Fusion of Style and Performance
The Ferrari 355 is a classic car that has captured the hearts of automobile enthusiasts worldwide. Its timeless design and powerful performance have made it a cherished model for many. But, like any classic car, certain features can become outdated over time. One such feature is the factory fog lights. Many owners find themselves with […]