LED Indicators. The factory incandescent turn signals on the Ford Super Duty F250/F350/F450/F550 illuminate in a slow glow, taking a moment to turn off and on. With replacement LED bulbs, you can immediately update your vehicle with the instant on-off blinking of modern LEDs. This instant activation adds a modern and distinct look to the Super Duty F250/F350/F450/F550.
Dual Brightness. The Super Duty F250/F350/F450/F550 uses adual-filament bulb. They light up with low power as parking lights, then they get brighter when the turn signal or hazards are activated. The brightness ratio of your factory bulbs is traditionally 15:100, or 15% lumen output for the dim function. Diode Dynamics bulbs are designed to match this, so there is enough distinction between "low" and "high" brightness levels. As with all Diode Dynamics LED bulbs, these turn signal bulbs are rated with accurate, measured lumen figures, not calculations or guesses.
Reduced Load. When it comes to LED upgrades, you'd think the lower power draw would be a great feature! However, the Super Duty F250/F350/F450/F550 looks for a specific power draw from the turn signals. LEDs will make the vehicle think a bulb has gone out, due to lower power draw. This causes a "hyperblink," or fast-blinking turn signal, which can be corrected with LED Resistors or an LED Flasher.
The most basic, tried-and-true method to correct hyperblinking is to add resistors. These can be used on any vehicle, because a 6-ohm resistor uses about the same power as a standard turn signal bulb. One resistor is needed to replace each turn signal bulb.
You may have also heard of flasher relays, which is the actual module that determines flash speed. On some vehicles, it can be replaced with one that is designed for LED power levels. However, on many newer vehicles these modules cannot be replaced. If it's possible to replace the flasher on the Super Duty F250/F350/F450/F550, you'll see one listed above. Only one flasher is needed per vehicle, for both front and rear LED turn signal conversions.
Reliability. Diode Dynamics LEDs are built with constant-current inductive circuitry, along with transient suppression. They are tested by our engineering team with a device that replicates years of voltage spikes, like the ones generated each time the alternator starts and stops on your Super Duty F250/F350/F450/F550. This is what kills most LED bulbs over time, but just like factory components, Diode Dynamics LEDs are designed with built-in circuit protection. While more expensive than simple bulbs, this allows Diode Dynamics LEDs to last for years, with no flickering or failure.
Experience. After over a decade in business, Diode Dynamics is one of the most trusted names in automotive LED lighting. We directly assemble and engineer an increasing number of products in the United States, allowing for higher quality and performance, with the newest and brightest LED technology. Whether it's a Ford or anything else, we pride ourselves in offering only the best possible LED solutions. Please contact us if you'd like to discuss your lighting project!
NOTE: Please check factory socket and bulb size before ordering as some models may use different size bulbs.
For 2017 models, reference the image below:
If your vehicle uses the TYPE A socket with a blue ring, our 7443 LED bulbs will be compatible.
If your vehicle uses the TYPE B socket with a red ring, our 4257 LED bulbs will be compatible.
| Length | 3in |
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