Indicator lamp, 8V, 250mA, fuse type. It was used by many of the vintage stereo receiver companies to back light tuner and control panel displays. This fuse lamp was very popular back in the 70's and 80's. Some of the manufacturers that used fuse lamps in their receivers and component systems include: Marantz, Sansui, Fisher, JVC, Protron, Lafayette, Panasonic, McIntosh, Pioneer and many others.