Frequently Asked Questions

Automotive - Lighting

QuestionWill these lights fit just like my existing lights?

Answer: Yes, the lights we sell are exact replacements for your existing lights. Your existing harnesses and/or bulbs will plug into the new lights exactly like your current lights, and all of our lights are DOT approved and SAE compliant.

Question: I heard there is a special way to handle Halogen bulbs, is this true?

Answer: You don't want to touch the glass portion of a halogen bulb, as any chemical, even oil from your skin, can shorten the life of the bulb. Just be careful when you handle and install them.

Question: What is an HID light bulb?

Answer: HID stands for "High Intensity Discharge". These bulbs use an electric arc rather than a glowing filament like a Halogen bulb. HID lights can also be referred to as Xenon bulbs (though not all Xenon bulbs are HID). HID headlamp bulbs do not run on low-voltage DC current like a Halogen, so they require a ballast, which controls current to the bulb, with either an internal or external ignitor. The ignitor is integrated into the bulb in some lighting systems, or is either a separate unit or part of the ballast in other systems, similar to fluorescent bulbs in your home. HID bulbs tend to be much more expensive to replace than a Halogen bulb on a vehicle.

Question: Do you carry bulbs that are brighter than stock bulbs?

Answer: Yes we do. Check out our PERDE Xenon and Krypton bulbs while looking up your vehicle. These cast a brighter, white light that reflects well off the road and allows you to see further in the dark. In most cases, these only use around 35 to 65 watts. Here at, we offer a limited Lifetime Warranty on perde bulbs. That's how much we believe in this product!

Question: Can I replace my stock Halogen headlights with HIDs?

Answer: Replacing stock Halogen headlights with HIDs would require some modifications, especially where the wiring is concerned. While the lamp can sometimes fit into the opening on the front of the vehicle, the stock lamps use different bulbs, sockets, fuses, relays, and wiring than most HID bulbs.  You may want to check with your local mechanic if you are unsure how to wire electrics on a vehicle, or check for a video on how (or if) the conversion can be done.

Question: What are Projector lights?

Answer: These types of lights are popular on most European vehicles, but are now becoming more common on other makes and models. Projector lights have a filament located at one focus of a reflector, and a round glass or heavy duty plastic condenser lens at the front of the lamp. These lenses in front of the light bulb distribute the light evenly across the front of the vehicle, and can give a larger range of visibility for the driver. The bulbs themselves are still usually common Halogen bulbs that can easily be changed.

Question: What is a "Halo" light?

Answer: Halo lights are also known as "eyebrows". You've probably seen them on some cars, such as BMWs, where they are the factory option. In some cases the effect is achieved with bulbs, while on other vehicles it's done with fiber optics, and often appear as a glowing "ring" around headlights. Halo Lights can be a popular upgrade to really make your car or truck stand out at night. Note that HALO lights we sell typically have to be manually wired up to your existing wiring harness with the lights (this is because your stock vehicle did not have HALOs, thus there is no wiring pigtail for them on the factory harness). There are two kinds of basic Halos: A CCFL (Cold Cathode Fluorescent Lamp) which is a much brighter style, and an LED Halo, which is a ring of small bright LEDs, like pearls, that run around the headlight. We carry the LED style, as the CCFL halos are much more fragile and prone to breakage. TIP: If you conect your Halos to the parking lights, they will come on when those and / or your headlights are on. There are many youtube videos on how mechanics do this.

Question: Do the headlight assemblies include bulbs?

Answer: For the most part, no. The stock replacement headlight assemblies are a direct equivalent to what is being taken out of the car. You can reuse your old bulbs and sockets, which should fit right in with no modifications needed. Some of the aftermarket units do use different Halogen bulbs than the stock ones. In those cases we sell the requisite bulb, and really, with the great deal we have on PERDE light bulbs, you can't go wrong with new bulbs that are much better than your stock bulbs.

Question: I have moisture in my headlamps. What's that all about?

Answer: Your old lights probably had moisture or condensation in them too, but who's going to look closely at old headlights? Who cares? Now that you have those new clear lights on your nice car, all of sudden you look at them every day, which is completly normal. Without going into too much detail, It's a fact that condensation happens just about anywhere. If there's a temperature difference between the inside and outside of the lens, moisture will occasionally develop, and, since your Halogen headlight bulbs put out some heat, the inside of the headlight is full of warm air while the outside is cooler. This is sort of like how the front window on your car can fog up and you have to turn on the defroster vent to clear it all away: The condensation in your headlights will usually just dissipate after some driving.

Question: Will I have to adjust my headlights after installing them?

Answer: You may well have to adjust the headlights after installation. If it's possible, when you take the old assembly out, you should match up new adjusters with the old ones. Adjust the new light as close to that on the old units as you can. That way, any adjustments you have to make on the car once they are installed will be minor. Our headlight assemblies have the same adjusters as the stock units, and there are many videos on Youtube on how to adjust lighting. Check your owners manual too, since not all vehicles are adjusted the same way. Finally, when adjusting, make sure your car is level, with a full tank of gas. More tips are online here: