Using these Spyder projector headlights is easy. First, refer to the Installation Guide to replace your old headlights with these new ones. Make sure to follow the steps carefully. When driving, the sequential switch - back white light bar turn signal, DRL white light bar parking light, and LED turn signal will work automatically to enhance your visibility. Note that these are halogen models, so they're not compatible with the factory LED model. Also, avoid adding HID/LED bulbs as it will void the warranty. For maintenance, regularly check the lights for any dirt or damage. Clean them gently with a soft cloth and mild cleaner. If you need to adjust the headlights, use the Headlight Adjustment Guide for proper alignment.