Are high intensity discharge (HID) conversion kits legal?
No, in order for a headlight to be legal for use in Washington State, it must conform to the Federal Motor Vehicle Safety Standards (FMVSS) 108 requirements for headlights. The National Highway Traffic Safety Administration (NHTSA) has concluded that it is impossible to produce HID conversion kits (converting a halogen system to HID) that would be compliant with FMVSS 108. Halogen equipment uses an electrical current to heat a metal wire coil filament to incandescence, while the HID conversion kit’s light source incorporates a discharge arc to produce light. HIDs require a ballast for operation. Under FMVSS 108 Section S7.7 (replacement light sources), each replaceable light source for headlamps must be designed to conform to the dimensions and electrical specifications for the headlamp source it is intended to replace. For example, if an HID kit is marketed as replacing an H1 light source, then it must match the H1’s wire coil filament size and location, the electrical connector size
