Every Spyder headlight undergoes a rigorous testing and quality control process before it leaves the factory. All wiring is tested to make sure the light is completely functional, and the housing is sealed with high quality silicone to ensure that no moisture can become trapped inside. Spyder lights are approved by the Society of Automotive Engineers (SAE), and ISO-9000 and ISO-9002 certified. They meet all U. S. Department of Transportation (DOT) regulations, and are compliant with Federal Motor Vehicle Safety Standard (FMVSS) 108. Most Spyder headlights come with detailed instructions to guide you through an easy installation.