Simply's Gas Discharge bulbs are high-quality OEM replacement bulbs for vehicles fitted with HID (High-Intensity Discharge) headlights. These bulbs require less electric current than filament lighting while providing impressive output. The white light provides illumination that is close to daylight to improve nighttime driving. Thanks to the impressive intensity of the light, the lamps provide better visibility on the road offering a safer journey. HIDs should be fitted by professionals. We recommend that xenon HID bulbs are replaced every three years, even if they don't appear to have failed. HIDs should always be replaced in pairs to ensure consistent performance. E marked and road legal. All packed in individual boxes.