Smartglow, 2 Pack, 30A, Small, Mini Automotive Fuse, Glows When It Blows, Day Or Night When A Fuse Blows, Indicates Immediately When A Fuse Needs Replacing, Saving Time To Troubleshoot An Open Circuit, Hard To Find Blown Fuses In Dimly-Lit Dashboards Are Easier To Identify, Giving Fleet Maintenance Departments The Ability To Quickly Return Vehicles To Operation, Designed To Be Direct Replacements For Existing Automobile Applications.