Bluecol headlight bulb the bluecol headlight bulb is a must to have on hand and make regular maintenance a breeze the bluecol headlight bulb is a direct replacement that can be installed in minutes to give your car a new lease of bright life bluecol headlight bulb bluecol branding easy install direct swap great to keep on hand please check with your cars own user guide to ensure you purchase the correct bulb type and how to correctly fit 448 h1