All TYC lamps are subject to rigorous vehicle test fit and other procedures to assure quality, drop-in, hassle-free products. Certified ISO9001:2000 and QS9000 facilities produce precision components for all aspects of light assembly. From plastics injection and extrusion to final construction of lamp assemblies and hardware.Rigorous cycling tests are conducted to ensure product service quality in the field. Numerous and arduous lighting parameters subject each lamp design to real world conditions. Strict compliance to all DOT and governing transportation regulation bodies are standard procedure for all product development, ensuring safety and standards alignment with all OE lamp manufacturers.