The worst part of taking care of a blown fuse is finding the fuse that is blown! The Smart Glow fuse lights up when it blows, telling you right away if the fuse is good or bad. No more need to plug and unplug fuses to find the bad one. If your time is valuable, you will be glad you spent a little extra for the Smart Glow fuse. Meets or exceeds O.E.M. and S.A.E. standards.