Zone Tech 35W HID Ballast &ndash; 2-Piece Premium Quality Universal Replacement 35W HID Ballast &#9658; 3X BRIGHTER - The Zone Tech HID ballast has a superior lighting technology. Instead of having a filament inside the bulb, it is replaced with xenon gas. When the xenon gas ignites, it produces a vivid and bright light that is 3X more powerful than that of a halogen bulb. &#9658; NATURAL LIGHT - The Zone Tech HID ballast emits a type of light that closely resembles natural daylight and is therefore easier on human eyes. The Zone Tech HID slim ballast are no match for the intensity, purity, and efficiency of high intensity discharge headlights. &#9658; PREMIUM QUALITY - The Zone Tech HID ballast are manufactured under the strictest of quality control. The ballasts are also shockproof and 100% waterproof and are resistant to heat and aging, as well as vibration tested. The ballast bulbs are made from premium quality materials to ensure durability and longevity. &#9658; WIDELY USED - The Zone Tech ballast uses HID (High Intensity Discharge) lighting. HID lights are currently used in most sports arenas, stadiums, and train stations worldwide. &#9658; DURABLE - The Zone Tech HID ballast are designed to run for over 3500 hours; which is usually good for life to your vehicle.