PIAA Powersports bulbs are engineered with XTRA Technology for greater performance per watt than any other bulb on the road. (XTRA is a term coined by PIAA to designate a high-efficiency bulb that is designed to produce greater light output than its rated power consumption, i.e. 65w of consumption = 85w of light output).Greatly enhance your ability to see and be seen. A metal bond holds the heat-resistant glass tube securely to prevent cracks and leaks. A welded focus ring and one-piece filament support assures proper positioning.