High Intensity Discharge (HID) headlamps provide a brighter, bluish-white appearance. HID headlamps use electrical energy to excite a metal halide. A quartz glass capsule filled with xenon gas receives a momentary high-voltage charge from an igniter, causing an arc between the two electrodes to light, then stabilize. The high output and small size of HID lamps allow them to be easily turned in active headlight systems to illuminate around corners
"The H.I.D.s in the new acura are so bright and blue."