H4Bixenon kit has 4 ballast - 2 ballast to each bulb. If you install this kit you have xenon light beam when you turn on the lows and when you turn on highs you have xenon beam on lows and xenon beam on highs at the same time. 1) Category/lamp HID lamp 2) Luminary Xenon lamp 3) Work method Arc discharge 4) Voltage, wattage 12v 35w 5) Lumen 3300lm 6) Color Temperature 4200-12000k Sense of vision Bright 7) Lifetime 3000hrs 8) Ultraviolet radiation No 9) Lighting area 350%