Herein provided is a method and apparatus that allows a pre-existing fuse housing to be easily modified and adapted to include a blown fuse indicator light thereon. Whereby when the fuse housing and light in combination are installed within an electrical circuit and if the fuse is no longer functional, the light will automatically illuminate so as to visually notify a user that the fuse needs to be replaced. Also, any suitable light source may be used, such as an LED, a cartridge type having end contacts, a long lasting reusable incandescent lamp, fiber optics, neon, etc.