PIAA 15962 H4 Style Super Plasma GT-X 60/55=135/120-Watt Bulb - Twin Pack Super plasma GT-X creates distinctive 5000K bluish-purple low beam and Xtreme White Plus high beam 60/55=135/120 watt: provides 135 watts of light using just 60 watts of power on the high beam Halogen bulb made of high quality heat-resistant tube Twin pack PIAA has nearly 50 years of experience designing and manufacturing high quality bulbs and lights