Why swith to LED? LEDs not only give your vehicle a clean, modern look but, with proper use, will outlast any halogen bulb and HID bulb! Low energy draw, high lumen output, and instant on/off LED technology out shines stock bulbs in every way. Which bulbs are used in my vehicle? Check Sylvania automotive lamp replacemnt guide, you can select the year, make, and model of your vehicle, then select the application you want to replace or upgrade from stock. What does CAN Bus mean? CAN Bus means Controller Area Network Bus. This system monitors your vehicle and reports operating conditions. CAN Bus systems are commonly found in European vehicles such as BMW, Audi, Mercedes, Volkswagen, Porsche, and in many American vehicles. While most late model American vehicles have CAN Bus systems, it is always good to check with your vehicle dealer to see which system your vehicle has before purchasing electrical products. When do you need Warning Canceller? Some vehicles with cmplex internal computers(such as Audi,BMW,Jaguar,Mercedes,etc.) might report on-dash errors or flickering on the headlights. The warning canceller fixes the dashboard warning and flickering effect. Bulb Out Dashboard Error: On some vehicles, the dashboard will report as if you have a headlight bulb missing or burnt. It does not affect the headlights functioning, but the light on-dash will be on. The warning canceller fixes the issue. Flickering Issue: This happens when your vehicle does not recognize the new headlights installed. When turning the headlights on, the vehicles computer does not understand the signal back from the headlights hence thinking they are still off. This triggers the headlight flickering effect. The warning canceller solves this issue. LED Advantages: Very low and efficient energy consumption than halogen bulbs & HID Bulbs Compared with HID bulbs, LED bulbs Light up instantly, no warm up period Low voltage protection, high precision constant current driver chip Longer lifespan than HID and halogen bulbs Light can be controlled easily in color and intensity Easy to install a LED headlight conversion kit If you have emailed us for a refund ,once we have approved it ,after 30 days your money will be refunded. The estimated time for the refund to appear in your account is based on the payment method you use. Paypal is the only supported in NIGHTEYE Store. Please notify us within 30 days after youve received your purchased item. Items to be returned must be in resalable condition, for example: Item do not fit your vehicle perfect The item arrived be broken Parcel Lost If you have problems with the above issue, please Contact Us immediately 1. We will ship your item(s) within 24 hours. 2. We ship this item to US only via USPS first class mail. It usually takes 3-6 working days to deliver. 1.We only accept PayPal payment, should be received within 3 days from the date of purchase. 2.Please keep the consistency of Paypal address and ebay address. 3.Payment should be made within 4 days once you won a item ,or ebay will launch Unpaid Reminder agaist you and there will be bad record on your ebay account . We maintain high standards of excellenceand strive for 100% customer satisfaction! Feedback is very important to us. We request that you contact us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns. [Our office hours are MONDAY - Saturday 9:00PM - 6:00PM PST, but we will response you once we get your message.There will be some delay on respons if you send message or E-Mail on Sundy.]