Tail lights: the ones behind you have less time to react
LED tail lights reach full brightness faster than a filament bulb. At highway speed that difference is a car length of extra reaction distance for whoever is behind you, which is a better argument for the upgrade than the way they look.
Sequential turn signals and smoked lenses are style choices with a legal dimension. Smoke reduces output, and enough of it will fail an inspection. Whatever you fit needs to be DOT-compliant, and on a modern truck it also needs to talk to a canbus system that will report a fault or hyper-flash if the load is wrong.
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60 Inch
60 Inch
Canbus, load resistors and third brake lights
A vehicle that monitors bulb current reads an LED as a burned-out lamp unless the assembly handles it. Kits are usually sold canbus-ready, but a cheap one will hyper-flash or throw a warning, and a load resistor is the fix people end up buying afterwards.
Third brake lights and tailgate light bars live in here too, and both need the same compliance check. We stock 70 tail light parts from 5 brands.