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We've talked about upgrading headlights on vintage cars. But why stop with your headlights? Replacing your other incandescent bulbs with their LED equivalents can give any car a more modern and prestigious appearance. They also catch your eye better than traditional automotive bulbs, improving safety. It would be fairly expensive to replace perfectly good headlight housings with their LED equivalents, but a turn signal upgrade was extremely affordable and easy to install.
Except the LED "bulb" contains several surface mount LEDs. They shine in numerous directions to utilize the lens and reflector the same way as the halogen bulb did, making it shine more brighter. Even better, without a glass amber bulb filling the housing, the turn signal remains shiny and chrome when it's not on rather than reflecting the amber bulb even though it's off. The LEDs themselves give the color it needs when it's illuminated.
But there is a problem. Without the load of two automotive halogen bulbs on the circuit, the flasher relay thinks you have a burned out bulb, and flashes twice as fast to warn you about it. This is known as "hyperflash." There are two ways to fix it. One way is to install a resistor kit in the circuit. This increases electrical resistance to the level the flasher relay expects it to be with both halogen bulbs in place, eliminating the hyperflash effect. The other way is to replace the flasher relay with an electronic one. This will flash at the correct speed regardless of how much load is on it.
One-touch signaling and approach/departure lighting - features the WRX Premium doesn't have from the factory, but add a touch of class as well as practicality. The numerous hazard light flash patterns aren't at all necessary, but they can be fun. Either way, the flasher is super easy to install, and makes all functions available immediately, whether you're replaced your halogen bulbs or not. Dome light and both map lights with cool white automotive led bulbs. They're compatible with the interior light dimmer functions, brighter, and run cooler than the halogen bulbs. And again, they make the interior seem a bit more upscale than the yellow glow of the original bulbs.
Many people intend to upgrade more bulbs to LEDs. Areas like the trunk or license plate will probably wait until they burn out. Headlight LEDs are more expensive, so I will probably wait until I need those as well. But with the advances in LED technology in recent years, there's little reason not to upgrade when you have the chance.