XTRA technology increases bulb performance Radiant white beam without bluish tint Larger glass tube for increased output Bulb burns at cooler temperature for increased bulb life Star White bulbs are significantly whiter and brighter than normal halogen bulbs. The Star White bulbs operate at 3800K while normal halogen bulbs operate at 3200K. Star White bulbs feature PIAA's exclusive XTRA Technology, which increases bulb performance without taxing your vehicle's electrical system. PIAA Star White Bulbs can be used to upgrade performance in headlights and many of the PIAA auxiliary lights available.